Android build v1.1.40

AGENTS.md

@@ -15,6 +15,9 @@
 - Controller navigation must not depend on touch, mouse, keyboard, or hidden developer-only shortcuts.
 - Focus state must always be visible and predictable when controller navigation is active.
 - Avoid interaction patterns that trap focus, lose focus, or require precise pointer input.
+- Controller navigation fixes must not break live combat bindings. When changing shared input routing, verify that combat-only actions still win during active combat: movement, ability casts, party targeting, pause, and overlay navigation must all work on AYN Thor controls.
+- `data-game-nav-active` and other custom navigation markers may coexist with live combat HUDs. Do not treat those markers as menu mode during active combat unless a pause/dialog/result overlay is visible.
+- Before considering any controller input change complete, test both states: no-overlay combat and menu/dialog navigation. No-overlay combat must include at least one successful ability cast from a controller binding and continuous analog movement on the AYN Thor control scheme.
 
 ## Architecture Requirements
 
@@ -34,6 +37,7 @@
 - IWT2 rendering can use a 2D canvas/game runtime, but renderer objects must not become the source of truth for saveable gameplay state.
 - IWT2 needs continuous movement input: left analog stick on AYN Thor and WASD on keyboard. Do not rely only on existing menu-style navigation actions for arena movement.
 - IWT2 menus, dialogs, inventory, collection log, pause overlays, and game-select screen must still follow controller navigation requirements.
+- IWT2 combat must preserve AYN Thor face/shoulder button ability bindings even when party frames, HUD controls, or target rails use custom controller navigation state. Menu navigation priority must never swallow ability inputs while `data-combat-active="true"` and no overlay is open.
 - IWT2 boss mechanics and indicators must be modular. Add reusable hit-shape, damage/status, telegraph/indicator, hazard, and marker primitives under `src/modes/iwt2/sim/` or `src/modes/iwt2/render/` instead of hardcoding boss-specific rules in Phaser scenes. Boss AI may compose these primitives, but renderer code should draw sim-owned indicators generically.
 - Every IWT2 boss must have a boss pet collection-log reward. Add the pet to IWT2 boss reward metadata when adding the boss, and keep boss kill pet drops at a rare 1 in 500 chance.
 - IWT2 boss and party movement must be built with crowding and hazard escape in mind from the first implementation. New bosses must not rely on straight-line chase or single-vector hazard avoidance if the boss can create ground effects, wall pressure, summons, or multi-boss overlap.

DEPLOYMENT.md

@@ -54,12 +54,18 @@ code updates to be a Git pull plus app restart.
 
 Portainer is not required. Use TrueNAS **Apps > Discover > Install via YAML**.
 
-Repository:
+Repository URL:
 
 ```text
 https://git.whoagland.com/phenom/i-want-to-heal.git
 ```
 
+Local Gitea repository path on the same TrueNAS host:
+
+```text
+/mnt/.ix-apps/app_mounts/gitea/data/git/repositories/phenom/i-want-to-heal.git
+```
+
 TrueNAS paths:
 
 ```text
@@ -67,12 +73,15 @@ TrueNAS paths:
 /mnt/usbssds/apps/iwanttoheal/data
 ```
 
-Create the app directory and clone the repo:
+Create the app directory and clone the repo. When Gitea is hosted on the same
+TrueNAS box, prefer the local repository path instead of HTTPS. This avoids
+Git-over-HTTPS TLS failures while downloading large pack files.
 
 ```sh
 sudo mkdir -p /mnt/usbssds/apps/iwanttoheal
 cd /mnt/usbssds/apps/iwanttoheal
-sudo git clone https://git.whoagland.com/phenom/i-want-to-heal.git app
+sudo git config --global --add safe.directory /mnt/.ix-apps/app_mounts/gitea/data/git/repositories/phenom/i-want-to-heal.git
+sudo git clone /mnt/.ix-apps/app_mounts/gitea/data/git/repositories/phenom/i-want-to-heal.git app
 ```
 
 Because the clone was run with `sudo`, give the normal TrueNAS user ownership:
@@ -101,6 +110,25 @@ cd /mnt/usbssds/apps/iwanttoheal/app
 git pull
 ```
 
+If setting up a different app hosted by the same Gitea instance, first find its
+bare repository path:
+
+```sh
+sudo find /mnt -type d -name "REPO-NAME.git" -prune -print 2>/dev/null
+```
+
+Then substitute that path in the `safe.directory` and `git clone` commands:
+
+```sh
+sudo git config --global --add safe.directory /mnt/.ix-apps/app_mounts/gitea/data/git/repositories/OWNER/REPO-NAME.git
+sudo git clone /mnt/.ix-apps/app_mounts/gitea/data/git/repositories/OWNER/REPO-NAME.git app
+sudo chown -R truenas_admin:truenas_admin app
+```
+
+`safe.directory` is a Git trust exception for the Gitea-owned bare repository.
+It is needed because Gitea's repository files are owned by the app/container
+user, not by `truenas_admin`.
+
 If Git fails with `chmod ... Operation not permitted`, do not use a media or SMB
 dataset for the repo. Git needs normal file locking and chmod behavior. Create or
 use a dedicated apps dataset and clone under `/mnt/usbssds/apps/...`.

android/app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.warren.iwanttoheal"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 108
+        versionCode 121
-        versionName "1.1.28"
+        versionName "1.1.40"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
              // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.

docs/push-updates.md

@@ -104,6 +104,10 @@ npm run release:cli -- --release-only 1.1.26
 
 ## Step 5: Update TrueNAS
 
+The TrueNAS app checkout should be cloned from the local Gitea bare repository
+path when Gitea runs on the same TrueNAS host. After that setup, normal updates
+still use `git pull`; the remote is local filesystem storage instead of HTTPS.
+
 ```sh
 cd /mnt/usbssds/apps/iwanttoheal/app
 git pull

scripts/iwt2-pvp-roguelike-boss-sim.mjs

@@ -0,0 +1,779 @@
+import { spawn } from 'node:child_process'
+import { createServer } from 'vite'
+
+const DEFAULT_WORKERS = Math.max(1, Math.min(8, Number.parseInt(process.env.IWT2_SIM_WORKERS ?? '8', 10)))
+const DEFAULT_MAX_SECONDS = Math.max(30, Number.parseFloat(process.env.IWT2_SIM_SECONDS ?? '180'))
+const DEFAULT_DT = 1 / 30
+const DEFAULT_TICKS_PER_WORKER_SECOND = 45000
+const ESTIMATE_STARTUP_SECONDS = 0.8
+const PVP_BOSS_HEALTH_MULTIPLIER = 0.7
+const BOSS_HEALTH_PER_STAGE = 0.1
+const ARENA_BOUNDS = { width: 960, height: 540 }
+const HEALER_STYLES = ['dawnweaver', 'lifebinder', 'runesage']
+const BOSS_IDS = [
+  'bulldrome',
+  'yian-kut-ku',
+  'great-jaggi',
+  'khezu',
+  'rathian',
+  'barroth',
+  'tobi-kadachi',
+  'rimebastion',
+  'ember-mantis-duelist',
+  'cinderback-ricochet',
+  'obsidian-ram-golem',
+  'stormcoil-wyrm',
+  'venom-orchid-hydra',
+  'sandglass-scorpion',
+  'crystal-bat-matriarch',
+  'hollowcrown-revenant',
+]
+const activeChildren = new Set()
+
+for (const signal of ['SIGINT', 'SIGTERM']) {
+  process.on(signal, () => {
+    for (const child of activeChildren) {
+      child.kill(signal)
+    }
+    process.exit(signal === 'SIGINT' ? 130 : 143)
+  })
+}
+
+const args = parseArgs(process.argv.slice(2))
+
+if (args.has('--help')) {
+  printHelp()
+  process.exit(0)
+}
+
+const config = {
+  bossCount: parsePositiveInt(args.get('--boss-count') ?? '2', 2),
+  bossDamagePercent: parsePositiveNumber(args.get('--boss-damage-percent') ?? '100', 100),
+  bossFilter: parseList(args.get('--bosses') ?? 'all'),
+  bossHpPercent: parsePositiveNumber(args.get('--boss-hp-percent') ?? '100', 100),
+  classes: parseList(args.get('--classes') ?? args.get('--class') ?? 'all'),
+  estimateOnly: args.has('--estimate-only'),
+  gearLevel: parseNonNegativeInt(args.get('--gear-level') ?? args.get('--gear') ?? '5', 5),
+  maxSeconds: Number.parseFloat(args.get('--seconds') ?? String(DEFAULT_MAX_SECONDS)),
+  repeats: parsePositiveInt(args.get('--repeats') ?? '1', 1),
+  requiredBosses: parseList(args.get('--required-bosses') ?? args.get('--include-bosses') ?? 'none'),
+  stages: parseStages(args.get('--stages') ?? '1,2'),
+  top: parsePositiveInt(args.get('--top') ?? '24', 24),
+  workers: Number.parseInt(args.get('--workers') ?? String(DEFAULT_WORKERS), 10),
+}
+
+if (args.has('--worker')) {
+  await runWorker({
+    bossCount: config.bossCount,
+    bossDamagePercent: config.bossDamagePercent,
+    bossFilter: config.bossFilter,
+    bossHpPercent: config.bossHpPercent,
+    classes: config.classes,
+    gearLevel: config.gearLevel,
+    repeats: config.repeats,
+    requiredBosses: config.requiredBosses,
+    shardIndex: Number.parseInt(args.get('--shard-index') ?? '0', 10),
+    shardCount: Number.parseInt(args.get('--shard-count') ?? '1', 10),
+    maxSeconds: config.maxSeconds,
+    stages: config.stages,
+  })
+} else {
+  await runMain(config)
+}
+
+async function runMain({
+  bossCount,
+  bossDamagePercent,
+  bossFilter,
+  bossHpPercent,
+  classes,
+  estimateOnly,
+  gearLevel,
+  maxSeconds,
+  repeats,
+  requiredBosses,
+  stages,
+  top,
+  workers,
+}) {
+  const safeWorkers = Math.max(1, Math.floor(workers))
+  const estimate = estimateRun({
+    bossCount,
+    bossFilter,
+    classes,
+    maxSeconds,
+    repeats,
+    requiredBosses,
+    stages,
+    workers: safeWorkers,
+  })
+  if (estimateOnly) {
+    console.log(JSON.stringify({
+      config: {
+        bossCount,
+        bosses: bossFilter,
+        classes,
+        repeats,
+        requiredBosses,
+        seconds: maxSeconds,
+        stages,
+        workers: safeWorkers,
+      },
+      estimate,
+    }, null, 2))
+    return
+  }
+  const startedAt = Date.now()
+  const childResults = await Promise.all(Array.from({ length: safeWorkers }, (_, shardIndex) => (
+    runChild({
+      bossCount,
+      bossDamagePercent,
+      bossFilter,
+      bossHpPercent,
+      classes,
+      gearLevel,
+      repeats,
+      requiredBosses,
+      shardIndex,
+      shardCount: safeWorkers,
+      maxSeconds,
+      stages,
+    })
+  )))
+  const results = childResults.flat()
+  const elapsedSeconds = round((Date.now() - startedAt) / 1000)
+  const summary = summarizeResults(results)
+  console.log(JSON.stringify({
+    config: {
+      bossCount,
+      bossDamagePercent,
+      bossHpPercent,
+      bosses: bossFilter,
+      classes,
+      gearLevel,
+      elapsedSeconds,
+      estimate,
+      orderedTrials: results.length,
+      repeats,
+      requiredBosses,
+      seconds: maxSeconds,
+      stages,
+      workers: safeWorkers,
+    },
+    hardestCombos: summary.hardestCombos.slice(0, top),
+    hardestStageCombos: summary.hardestStageCombos.slice(0, top),
+    topMechanics: summary.topMechanics,
+    weakestSingleBosses: summary.weakestSingleBosses.slice(0, 16),
+  }, null, 2))
+}
+
+function runChild({
+  bossCount,
+  bossDamagePercent,
+  bossFilter,
+  bossHpPercent,
+  classes,
+  gearLevel,
+  repeats,
+  requiredBosses,
+  shardIndex,
+  shardCount,
+  maxSeconds,
+  stages,
+}) {
+  return new Promise((resolve, reject) => {
+    const child = spawn(process.execPath, [
+      new URL(import.meta.url).pathname,
+      '--worker',
+      '--boss-count',
+      String(bossCount),
+      '--boss-damage-percent',
+      String(bossDamagePercent),
+      '--bosses',
+      bossFilter.join(','),
+      '--boss-hp-percent',
+      String(bossHpPercent),
+      '--classes',
+      classes.join(','),
+      '--gear-level',
+      String(gearLevel),
+      '--repeats',
+      String(repeats),
+      '--required-bosses',
+      requiredBosses.join(','),
+      '--shard-index',
+      String(shardIndex),
+      '--shard-count',
+      String(shardCount),
+      '--seconds',
+      String(maxSeconds),
+      '--stages',
+      stages.join(','),
+    ], {
+      cwd: process.cwd(),
+      env: { ...process.env, VITE_CJS_IGNORE_WARNING: 'true' },
+      stdio: ['ignore', 'pipe', 'pipe'],
+    })
+    activeChildren.add(child)
+
+    let stdout = ''
+    let stderr = ''
+    child.stdout.on('data', (chunk) => {
+      stdout += chunk
+    })
+    child.stderr.on('data', (chunk) => {
+      stderr += chunk
+    })
+    child.on('error', reject)
+    child.on('close', (code) => {
+      activeChildren.delete(child)
+      if (code !== 0) {
+        reject(new Error(`worker ${shardIndex} exited ${code}\n${stderr}`))
+        return
+      }
+      try {
+        resolve(JSON.parse(stdout))
+      } catch (error) {
+        reject(new Error(`worker ${shardIndex} returned invalid JSON\n${stdout}\n${stderr}\n${error}`))
+      }
+    })
+  })
+}
+
+async function runWorker({
+  bossCount,
+  bossDamagePercent,
+  bossFilter,
+  bossHpPercent,
+  classes,
+  gearLevel,
+  repeats,
+  requiredBosses,
+  shardIndex,
+  shardCount,
+  maxSeconds,
+  stages,
+}) {
+  const server = await createServer({
+    appType: 'custom',
+    configFile: 'vite.config.ts',
+    logLevel: 'error',
+    server: { middlewareMode: true },
+  })
+  try {
+    const modules = await loadSimModules(server)
+    const bossIds = filteredBossIds(Object.keys(modules.IWT2_BOSS_METADATA), bossFilter)
+    const requiredBossIds = filteredRequiredBossIds(bossIds, requiredBosses)
+    const healerStyles = filteredClasses(classes)
+    const orderedBossGroups = permutations(bossIds, bossCount)
+      .filter((group) => requiredBossIds.every((bossId) => group.includes(bossId)))
+    if (orderedBossGroups.length === 0) {
+      throw new Error(`No boss combinations generated. Boss count ${bossCount}; required bosses: ${requiredBossIds.join(', ') || 'none'}.`)
+    }
+    const tasks = []
+    for (let repeatIndex = 0; repeatIndex < repeats; repeatIndex += 1) {
+      for (const stage of stages) {
+        for (const healerStyle of healerStyles) {
+          for (const group of orderedBossGroups) {
+            tasks.push({
+              bossDamagePercent,
+              bossHpPercent,
+              bossIds: group,
+              gearLevel,
+              healerStyle,
+              repeatIndex,
+              stage,
+            })
+          }
+        }
+      }
+    }
+    const results = []
+    for (let index = 0; index < tasks.length; index += 1) {
+      if (index % shardCount !== shardIndex) continue
+      results.push(simulateTrial(modules, tasks[index], maxSeconds))
+    }
+    console.log(JSON.stringify(results))
+  } finally {
+    await server.close()
+  }
+}
+
+async function loadSimModules(server) {
+  const sim = await server.ssrLoadModule('/src/modes/iwt2/sim/index.ts')
+  const bosses = await server.ssrLoadModule('/src/modes/iwt2/content/bosses.ts')
+  const healerAbilities = await server.ssrLoadModule('/src/modes/iwt2/content/healerAbilities.ts')
+  const gear = await server.ssrLoadModule('/src/modes/iwt2/content/pvpGearNormalization.ts')
+  const equipment = await server.ssrLoadModule('/src/modes/iwt2/sim/equipmentStats.ts')
+  const pressure = await server.ssrLoadModule('/src/modes/iwt2/sim/roguelikePressure.ts')
+  return {
+    ...sim,
+    ...bosses,
+    ...healerAbilities,
+    ...gear,
+    ...equipment,
+    ...pressure,
+  }
+}
+
+function simulateTrial(modules, task, maxSeconds) {
+  const gearProgress = modules.createIwt2PvpNormalizedGearProgress({
+    enabled: true,
+    gearLevel: task.gearLevel,
+  })
+  const bossHealthScale = (1 + Math.max(0, task.stage - 1) * BOSS_HEALTH_PER_STAGE)
+    * PVP_BOSS_HEALTH_MULTIPLIER
+    * (task.bossHpPercent / 100)
+  const damageScale = modules.roguelikeIncomingDamageScale(task.stage, 'dungeon') * (task.bossDamagePercent / 100)
+  let state = modules.createInitialIwt2ArenaState(
+    task.bossIds[0],
+    task.bossIds,
+    bossHealthScale,
+    damageScale,
+    modules.createRoguelikePressureState(task.stage, 'dungeon'),
+    ARENA_BOUNDS,
+  )
+  state = modules.applyIwt2PveGearStats(state, gearProgress)
+  const abilities = modules.applyIwt2PveGearToHealerAbilities(
+    modules.abilitiesForHealer(task.healerStyle),
+    gearProgress,
+  )
+  const cooldowns = {}
+  const eventCounts = {}
+  const mechanicDamage = {}
+  const sourceDamage = {}
+  const sourceDefeats = {}
+  let casts = 0
+  let maxActiveHazards = 0
+  let maxHostileAdds = 0
+  let minLivingHealthRatio = 1
+  let minLivingCount = state.party.length
+  let outcome = 'timeout'
+
+  for (let step = 0; step < Math.ceil(maxSeconds / DEFAULT_DT); step += 1) {
+    const healResult = maybeCastHeal(modules, state, abilities, cooldowns)
+    state = healResult.state
+    casts += healResult.cast ? 1 : 0
+    tickCooldowns(cooldowns, DEFAULT_DT)
+    const previousState = state
+    const previousEventId = state.nextEventId
+    state = modules.tickIwt2Arena(state, scriptedMovement(state, task.repeatIndex), DEFAULT_DT)
+    const newEvents = state.events.filter((event) => event.id >= previousEventId)
+    for (const event of newEvents) {
+      eventCounts[event.type] = (eventCounts[event.type] ?? 0) + 1
+      if (isDamageEvent(event) && typeof event.value === 'number') {
+        sourceDamage[event.sourceId] = (sourceDamage[event.sourceId] ?? 0) + event.value
+        const mechanic = mechanicLabelForEvent(event, previousState)
+        mechanicDamage[mechanic] = (mechanicDamage[mechanic] ?? 0) + event.value
+      } else if (event.type === 'entityDefeated' && typeof event.targetId === 'string' && event.targetId !== 'yian-kut-ku') {
+        sourceDefeats[event.sourceId] = (sourceDefeats[event.sourceId] ?? 0) + 1
+      }
+    }
+    maxActiveHazards = Math.max(maxActiveHazards, state.hazards.filter((hazard) => hazard.remainingSeconds > hazard.fadeSeconds).length)
+    maxHostileAdds = Math.max(maxHostileAdds, state.hostileAdds.filter((add) => add.health > 0).length)
+    const living = state.party.filter((member) => member.health > 0)
+    minLivingCount = Math.min(minLivingCount, living.length)
+    for (const member of living) {
+      minLivingHealthRatio = Math.min(minLivingHealthRatio, member.health / member.maxHealth)
+    }
+    if (state.bosses.every((boss) => boss.health <= 0)) {
+      outcome = 'victory'
+      break
+    }
+    if (state.party.every((member) => member.health <= 0)) {
+      outcome = 'defeat'
+      break
+    }
+  }
+
+  const remainingBossHealth = state.bosses.reduce((total, boss) => total + Math.max(0, boss.health), 0)
+  const maxBossHealth = state.bosses.reduce((total, boss) => total + boss.maxHealth, 0)
+  const partyHealth = state.party.reduce((total, member) => total + Math.max(0, member.health), 0)
+  const partyMaxHealth = state.party.reduce((total, member) => total + member.maxHealth, 0)
+  return {
+    bossIds: task.bossIds,
+    comboKey: comboKey(task.bossIds),
+    deaths: state.party.filter((member) => member.health <= 0).length,
+    eventCounts,
+    gearLevel: task.gearLevel,
+    healerStyle: task.healerStyle,
+    mechanicDamage,
+    maxActiveHazards,
+    maxHostileAdds,
+    minLivingCount,
+    minLivingHealthRatio: round(minLivingHealthRatio),
+    outcome,
+    partyHealthRatio: round(partyHealth / partyMaxHealth),
+    remainingBossHealthRatio: round(remainingBossHealth / maxBossHealth),
+    repeatIndex: task.repeatIndex,
+    sourceDamage,
+    sourceDefeats,
+    seconds: round(state.time),
+    stage: task.stage,
+    casts,
+  }
+}
+
+function maybeCastHeal(modules, state, abilities, cooldowns) {
+  const healer = state.party.find((member) => member.id === 'player-healer')
+  if (!healer || healer.health <= 0) return { cast: false, state }
+  const living = state.party.filter((member) => member.health > 0)
+  if (living.length === 0) return { cast: false, state }
+  const lowest = [...living].sort((a, b) => healthRatio(a) - healthRatio(b))[0]
+  const disabled = [...living]
+    .filter((member) => member.status.stunnedSeconds > 0 || member.status.knockedDownSeconds > 0)
+    .sort((a, b) => healthRatio(a) - healthRatio(b))[0]
+  const woundedCount = living.filter((member) => healthRatio(member) < 0.82).length
+  const candidates = [
+    woundedCount >= 3 ? ['group', lowest.id] : null,
+    disabled && healthRatio(disabled) < 0.95 ? ['cleanse', disabled.id] : null,
+    lowest && healthRatio(lowest) < 0.42 ? ['direct', lowest.id] : null,
+    lowest && healthRatio(lowest) < 0.78 && lowest.shield <= 0 ? ['shield', lowest.id] : null,
+    lowest && healthRatio(lowest) < 0.88 && !hasHot(lowest) ? ['hot', lowest.id] : null,
+    lowest && healthRatio(lowest) < 0.72 ? ['direct', lowest.id] : null,
+  ].filter(Boolean)
+
+  for (const [kind, targetId] of candidates) {
+    const ability = abilities.find((candidate) => candidate.kind === kind && (cooldowns[candidate.id] ?? 0) <= 0)
+    if (!ability) continue
+    const result = modules.castIwt2HealerAbility(state, ability, targetId)
+    if (!result.cast) continue
+    cooldowns[ability.id] = ability.cooldownSeconds
+    return result
+  }
+  return { cast: false, state }
+}
+
+function scriptedMovement(state, repeatIndex = 0) {
+  const healer = state.party.find((member) => member.id === 'player-healer')
+  if (!healer || healer.health <= 0) return { moveX: 0, moveY: 0 }
+  const livingBosses = state.bosses.filter((boss) => boss.health > 0)
+  const nearestBoss = livingBosses
+    .map((boss) => ({ boss, distance: Math.hypot(boss.position.x - healer.position.x, boss.position.y - healer.position.y) }))
+    .sort((a, b) => a.distance - b.distance)[0]?.boss
+  const away = nearestBoss
+    ? normalize({ x: healer.position.x - nearestBoss.position.x, y: healer.position.y - nearestBoss.position.y })
+    : { x: 0, y: 0 }
+  const orbitSeconds = Math.max(1, state.time) + repeatIndex * 1.731
+  const orbit = normalize({
+    x: Math.cos(orbitSeconds * 0.75),
+    y: Math.sin(orbitSeconds * 0.75) * 0.55,
+  })
+  const vector = normalize({
+    x: away.x * 0.6 + orbit.x * 0.4,
+    y: away.y * 0.6 + orbit.y * 0.4,
+  })
+  return { moveX: vector.x, moveY: vector.y }
+}
+
+function summarizeResults(results) {
+  const byCombo = new Map()
+  const byStageCombo = new Map()
+  const byBoss = new Map()
+  for (const result of results) {
+    pushGroup(byCombo, result.comboKey, result)
+    pushGroup(byStageCombo, `${result.stage}:${result.comboKey}`, result)
+    for (const bossId of new Set(result.bossIds)) {
+      pushGroup(byBoss, bossId, result)
+    }
+  }
+  return {
+    hardestCombos: [...byCombo.entries()]
+      .map(([key, items]) => summarizeGroup(key, items))
+      .sort(compareDifficulty),
+    hardestStageCombos: [...byStageCombo.entries()]
+      .map(([key, items]) => summarizeGroup(key, items))
+      .sort(compareDifficulty),
+    topMechanics: topSources(results, 'mechanicDamage'),
+    weakestSingleBosses: [...byBoss.entries()]
+      .map(([key, items]) => summarizeGroup(key, items))
+      .sort(compareDifficulty),
+  }
+}
+
+function summarizeGroup(key, items) {
+  const failures = items.filter((item) => item.outcome !== 'victory').length
+  const wins = items.length - failures
+  return {
+    key,
+    trials: items.length,
+    failures,
+    winRate: round(wins / items.length),
+    avgDeaths: round(average(items.map((item) => item.deaths))),
+    avgSeconds: round(average(items.map((item) => item.seconds))),
+    avgRemainingBossHealth: round(average(items.map((item) => item.remainingBossHealthRatio))),
+    worstRemainingBossHealth: round(Math.max(...items.map((item) => item.remainingBossHealthRatio))),
+    worstMinLivingCount: Math.min(...items.map((item) => item.minLivingCount)),
+    outcomes: countBy(items.map((item) => item.outcome)),
+    topDamageSources: topSources(items, 'sourceDamage'),
+    topDefeatSources: topSources(items, 'sourceDefeats'),
+    topMechanics: topSources(items, 'mechanicDamage'),
+    maxActiveHazards: Math.max(...items.map((item) => item.maxActiveHazards)),
+    maxHostileAdds: Math.max(...items.map((item) => item.maxHostileAdds)),
+  }
+}
+
+function compareDifficulty(a, b) {
+  return (b.failures - a.failures)
+    || (a.winRate - b.winRate)
+    || (b.avgDeaths - a.avgDeaths)
+    || (b.avgRemainingBossHealth - a.avgRemainingBossHealth)
+    || (b.avgSeconds - a.avgSeconds)
+}
+
+function pushGroup(map, key, item) {
+  const items = map.get(key)
+  if (items) items.push(item)
+  else map.set(key, [item])
+}
+
+function isDamageEvent(event) {
+  return event.type === 'partyDamaged'
+    || event.type === 'bossChargeHit'
+    || event.type === 'bossProjectileHit'
+    || event.type === 'groundHazardTick'
+}
+
+function mechanicLabelForEvent(event, state) {
+  const sourceId = String(event.sourceId)
+  if (sourceId === 'roguelike-pressure') return 'Roguelike pressure'
+  if (sourceId.startsWith('yian-bird')) {
+    return event.type === 'groundHazardTick'
+      ? 'yian-kut-ku: bird fire puddle'
+      : 'yian-kut-ku: bird add'
+  }
+  if (event.type === 'bossProjectileHit') return `${sourceId}: projectile`
+  if (event.type === 'groundHazardTick') return `${sourceId}: ground hazard`
+  if (event.type === 'bossChargeHit') return `${sourceId}: charge / dash`
+  const boss = state.bosses?.find((entry) => entry.id === sourceId)
+  if (!boss) return `${sourceId}: ${event.type}`
+  return `${sourceId}: ${phaseMechanicLabel(boss.attackPhase)}`
+}
+
+function phaseMechanicLabel(phase) {
+  if (phase.includes('Windup') || phase.includes('Recover')) {
+    return phase
+      .replace(/Windup$/, '')
+      .replace(/Recover$/, '')
+      .replace(/[A-Z]/g, (letter) => ` ${letter.toLowerCase()}`)
+      .trim()
+  }
+  if (phase.includes('Pouncing')) return 'pounce'
+  if (phase.includes('Charging')) return 'charge / dash'
+  if (phase.includes('Ricocheting')) return 'ricochet'
+  if (phase.includes('Burrowing')) return 'burrow'
+  if (phase === 'fireballRecover' || phase === 'fireballWindup') return 'fireball'
+  if (phase === 'idle') return 'melee / contact'
+  return phase.replace(/[A-Z]/g, (letter) => ` ${letter.toLowerCase()}`).trim()
+}
+
+function parseArgs(rawArgs) {
+  const parsed = new Map()
+  for (let index = 0; index < rawArgs.length; index += 1) {
+    const arg = rawArgs[index]
+    if (!arg.startsWith('--')) continue
+    const inlineValueIndex = arg.indexOf('=')
+    if (inlineValueIndex >= 0) {
+      parsed.set(arg.slice(0, inlineValueIndex), arg.slice(inlineValueIndex + 1))
+      continue
+    }
+    const next = rawArgs[index + 1]
+    if (next && !next.startsWith('--')) {
+      parsed.set(arg, next)
+      index += 1
+    } else {
+      parsed.set(arg, 'true')
+    }
+  }
+  return parsed
+}
+
+function printHelp() {
+  console.log(`IWT2 PvP roguelike boss simulator
+
+Usage:
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs [options]
+
+Options:
+  --classes all|dawnweaver,lifebinder,runesage
+  --gear-level 0|5|N
+  --boss-count 2|3|N
+  --bosses all|bulldrome,yian-kut-ku,...
+  --required-bosses none|yian-kut-ku,...
+  --repeats 1
+  --estimate-only
+  --boss-hp-percent 100
+  --boss-damage-percent 100
+  --stages 1,2
+  --seconds 180
+  --workers 8
+  --top 24
+
+Examples:
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs --classes dawnweaver --gear-level 0
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs --classes all --gear-level 5 --boss-count 3
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs --boss-hp-percent 125 --boss-damage-percent 110
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs --bosses yian-kut-ku,rathian,rimebastion --boss-count 2
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs --required-bosses yian-kut-ku --repeats 10
+  node scripts/iwt2-pvp-roguelike-boss-sim.mjs --required-bosses yian-kut-ku --estimate-only
+`)
+}
+
+function estimateRun({
+  bossCount,
+  bossFilter,
+  classes,
+  maxSeconds,
+  repeats,
+  requiredBosses,
+  stages,
+  workers,
+}) {
+  const bossIds = filteredBossIds(BOSS_IDS, bossFilter)
+  const requiredBossIds = filteredRequiredBossIds(bossIds, requiredBosses)
+  const healerStyles = filteredClasses(classes)
+  const orderedBossGroups = permutations(bossIds, bossCount)
+    .filter((group) => requiredBossIds.every((bossId) => group.includes(bossId)))
+  const trials = orderedBossGroups.length * healerStyles.length * stages.length * repeats
+  const maxTicks = trials * maxSeconds * (1 / DEFAULT_DT)
+  const estimatedWallSeconds = ESTIMATE_STARTUP_SECONDS + (maxTicks / (Math.max(1, workers) * DEFAULT_TICKS_PER_WORKER_SECOND))
+  return {
+    bossPoolSize: bossIds.length,
+    classCount: healerStyles.length,
+    orderedBossGroupCount: orderedBossGroups.length,
+    requiredBosses: requiredBossIds,
+    stageCount: stages.length,
+    repeats,
+    trials,
+    maxSimulatedSeconds: round(trials * maxSeconds),
+    maxTicks: Math.round(maxTicks),
+    estimatedWallSeconds: round(estimatedWallSeconds),
+    note: 'Rough wall-time estimate; victories or defeats can end trials early.',
+  }
+}
+
+function filteredBossIds(allBossIds, filter) {
+  if (filter.length === 0 || filter.includes('all')) return allBossIds
+  const known = new Set(allBossIds)
+  const selected = filter.filter((bossId) => known.has(bossId))
+  if (selected.length === 0) {
+    throw new Error(`No valid bosses selected. Known bosses: ${allBossIds.join(', ')}`)
+  }
+  return selected
+}
+
+function filteredClasses(classes) {
+  if (classes.length === 0 || classes.includes('all')) return HEALER_STYLES
+  const selected = classes.filter((healerStyle) => HEALER_STYLES.includes(healerStyle))
+  if (selected.length === 0) {
+    throw new Error(`No valid classes selected. Known classes: ${HEALER_STYLES.join(', ')}`)
+  }
+  return selected
+}
+
+function filteredRequiredBossIds(bossIds, requiredBosses) {
+  if (requiredBosses.length === 0 || requiredBosses.includes('none') || requiredBosses.includes('all')) return []
+  const bossSet = new Set(bossIds)
+  const selected = requiredBosses.filter((bossId) => bossSet.has(bossId))
+  if (selected.length === 0) {
+    throw new Error(`No required bosses are in the selected boss pool. Required: ${requiredBosses.join(', ')}. Pool: ${bossIds.join(', ')}`)
+  }
+  return [...new Set(selected)]
+}
+
+function permutations(items, count) {
+  const safeCount = Math.max(1, Math.min(items.length, Math.floor(count)))
+  const results = []
+  const walk = (current, remaining) => {
+    if (current.length === safeCount) {
+      results.push(current)
+      return
+    }
+    for (let index = 0; index < remaining.length; index += 1) {
+      const next = remaining[index]
+      walk([...current, next], remaining.filter((_, remainingIndex) => remainingIndex !== index))
+    }
+  }
+  walk([], items)
+  return results
+}
+
+function parseList(value) {
+  return value
+    .split(',')
+    .map((item) => item.trim())
+    .filter(Boolean)
+}
+
+function parseStages(value) {
+  return value.split(',').map((stage) => Number.parseInt(stage, 10)).filter(Number.isFinite)
+}
+
+function parsePositiveInt(value, fallback) {
+  const parsed = Number.parseInt(value, 10)
+  return Number.isFinite(parsed) && parsed > 0 ? parsed : fallback
+}
+
+function parseNonNegativeInt(value, fallback) {
+  const parsed = Number.parseInt(value, 10)
+  return Number.isFinite(parsed) && parsed >= 0 ? parsed : fallback
+}
+
+function parsePositiveNumber(value, fallback) {
+  const parsed = Number.parseFloat(value)
+  return Number.isFinite(parsed) && parsed > 0 ? parsed : fallback
+}
+
+function comboKey(bossIds) {
+  return [...bossIds].sort().join(' + ')
+}
+
+function hasHot(member) {
+  return member.hotEffects.some((effect) => effect.remainingSeconds > 1.5)
+}
+
+function healthRatio(member) {
+  return member.health / member.maxHealth
+}
+
+function tickCooldowns(cooldowns, dt) {
+  for (const [id, remaining] of Object.entries(cooldowns)) {
+    const next = Math.max(0, remaining - dt)
+    if (next > 0) cooldowns[id] = next
+    else delete cooldowns[id]
+  }
+}
+
+function countBy(items) {
+  return items.reduce((counts, item) => {
+    counts[item] = (counts[item] ?? 0) + 1
+    return counts
+  }, {})
+}
+
+function topSources(items, key) {
+  const totals = {}
+  for (const item of items) {
+    for (const [sourceId, value] of Object.entries(item[key] ?? {})) {
+      totals[sourceId] = (totals[sourceId] ?? 0) + value
+    }
+  }
+  return Object.entries(totals)
+    .sort((first, second) => second[1] - first[1])
+    .slice(0, 5)
+    .map(([sourceId, value]) => ({ sourceId, value: round(value) }))
+}
+
+function average(values) {
+  return values.reduce((total, value) => total + value, 0) / Math.max(1, values.length)
+}
+
+function normalize(vector) {
+  const magnitude = Math.hypot(vector.x, vector.y)
+  if (magnitude <= 0.0001) return { x: 0, y: 0 }
+  return { x: vector.x / magnitude, y: vector.y / magnitude }
+}
+
+function round(value) {
+  return Math.round(value * 1000) / 1000
+}

scripts/iwt2-pvp-sim-gui-server.mjs

@@ -0,0 +1,662 @@
+import http from 'node:http'
+import { spawn } from 'node:child_process'
+import { fileURLToPath } from 'node:url'
+import { dirname, resolve } from 'node:path'
+
+const SCRIPT_DIR = dirname(fileURLToPath(import.meta.url))
+const ROOT = resolve(SCRIPT_DIR, '..')
+const SIM_SCRIPT = resolve(SCRIPT_DIR, 'iwt2-pvp-roguelike-boss-sim.mjs')
+const PORT = Number.parseInt(process.env.IWT2_SIM_GUI_PORT ?? '8787', 10)
+
+const HEALER_CLASSES = ['dawnweaver', 'lifebinder', 'runesage']
+const BOSS_IDS = [
+  'bulldrome',
+  'yian-kut-ku',
+  'great-jaggi',
+  'khezu',
+  'rathian',
+  'barroth',
+  'tobi-kadachi',
+  'rimebastion',
+  'ember-mantis-duelist',
+  'cinderback-ricochet',
+  'obsidian-ram-golem',
+  'stormcoil-wyrm',
+  'venom-orchid-hydra',
+  'sandglass-scorpion',
+  'crystal-bat-matriarch',
+  'hollowcrown-revenant',
+]
+
+let activeRun = null
+
+const server = http.createServer(async (request, response) => {
+  const url = new URL(request.url ?? '/', `http://${request.headers.host ?? `localhost:${PORT}`}`)
+  if (request.method === 'GET' && url.pathname === '/') {
+    sendHtml(response)
+    return
+  }
+  if (request.method === 'GET' && url.pathname === '/config') {
+    sendJson(response, { bosses: BOSS_IDS, classes: HEALER_CLASSES })
+    return
+  }
+  if (request.method === 'POST' && url.pathname === '/run') {
+    const body = await readJson(request)
+    startRun(body, response)
+    return
+  }
+  if (request.method === 'POST' && url.pathname === '/stop') {
+    stopRun()
+    sendJson(response, { ok: true })
+    return
+  }
+  response.writeHead(404)
+  response.end('not found')
+})
+
+server.on('error', (error) => {
+  if (error.code === 'EADDRINUSE') {
+    console.error(`Port ${PORT} is already in use. Try: IWT2_SIM_GUI_PORT=${PORT + 1} node scripts/iwt2-pvp-sim-gui-server.mjs`)
+    process.exit(1)
+  }
+  throw error
+})
+
+server.listen(PORT, () => {
+  console.log(`IWT2 PvP sim GUI: http://localhost:${PORT}`)
+})
+
+function startRun(options, response) {
+  if (activeRun) {
+    response.writeHead(409, { 'content-type': 'application/json' })
+    response.end(JSON.stringify({ error: 'A simulation is already running.' }))
+    return
+  }
+
+  const command = [
+    process.execPath,
+    SIM_SCRIPT,
+    '--classes',
+    listOrAll(options.classes, HEALER_CLASSES),
+    '--gear-level',
+    scalar(options.gearLevel, '5'),
+    '--boss-count',
+    scalar(options.bossCount, '2'),
+    '--bosses',
+    listOrAll(options.bosses, BOSS_IDS),
+    '--boss-hp-percent',
+    scalar(options.bossHpPercent, '100'),
+    '--boss-damage-percent',
+    scalar(options.bossDamagePercent, '100'),
+    '--stages',
+    scalar(options.stages, '1,2'),
+    '--seconds',
+    scalar(options.seconds, '180'),
+    '--workers',
+    scalar(options.workers, '8'),
+    '--repeats',
+    scalar(options.repeats, '1'),
+    '--required-bosses',
+    listOrNone(options.requiredBosses, BOSS_IDS),
+    '--top',
+    scalar(options.top, '24'),
+  ]
+
+  response.writeHead(200, {
+    'cache-control': 'no-cache',
+    'connection': 'keep-alive',
+    'content-type': 'text/event-stream',
+  })
+  writeEvent(response, 'status', { command: command.join(' '), status: 'started' })
+
+  const child = spawn(command[0], command.slice(1), {
+    cwd: ROOT,
+    env: { ...process.env, VITE_CJS_IGNORE_WARNING: 'true' },
+    stdio: ['ignore', 'pipe', 'pipe'],
+  })
+  activeRun = child
+  let output = ''
+
+  child.stdout.on('data', (chunk) => {
+    const text = chunk.toString()
+    output += text
+    writeEvent(response, 'chunk', { text })
+  })
+  child.stderr.on('data', (chunk) => {
+    const text = chunk.toString()
+    output += text
+    writeEvent(response, 'chunk', { text })
+  })
+  child.on('close', (code) => {
+    activeRun = null
+    writeEvent(response, 'done', {
+      code,
+      json: extractJson(output),
+    })
+    response.end()
+  })
+  child.on('error', (error) => {
+    activeRun = null
+    writeEvent(response, 'error', { error: String(error) })
+    response.end()
+  })
+}
+
+function stopRun() {
+  if (!activeRun) return
+  activeRun.kill('SIGTERM')
+}
+
+function sendHtml(response) {
+  response.writeHead(200, { 'content-type': 'text/html; charset=utf-8' })
+  response.end(`<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>IWT2 PvP Sim GUI</title>
+  <style>
+    :root { color-scheme: dark; font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: #111419; color: #eef2f6; }
+    body { margin: 0; min-height: 100vh; background: #111419; }
+    main { display: grid; grid-template-columns: 340px minmax(0, 1fr); min-height: 100vh; }
+    aside { border-right: 1px solid #2a3039; padding: 18px; background: #171b22; overflow: auto; }
+    section { padding: 18px; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
+    h1 { font-size: 18px; margin: 0 0 16px; }
+    h2 { font-size: 13px; margin: 18px 0 8px; color: #b7c2d0; text-transform: uppercase; letter-spacing: .05em; }
+    label { display: flex; align-items: center; gap: 8px; margin: 7px 0; font-size: 13px; }
+    input[type="text"], input[type="number"] { width: 100%; box-sizing: border-box; background: #0f1217; color: #eef2f6; border: 1px solid #333b47; border-radius: 6px; padding: 8px 9px; }
+    input[type="checkbox"] { accent-color: #61dafb; }
+    .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
+    .bosses { max-height: 300px; overflow: auto; border: 1px solid #2a3039; border-radius: 6px; padding: 8px; background: #111419; }
+    .buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 16px; }
+    .estimate { display: grid; gap: 6px; background: #111419; border: 1px solid #2a3039; border-radius: 6px; color: #d9e3ee; font-size: 13px; margin-top: 16px; padding: 10px; }
+    .estimate strong { font-size: 18px; }
+    .estimate span { color: #96a3b5; }
+    button { border: 1px solid #3a4656; color: #eef2f6; background: #202733; border-radius: 6px; padding: 9px 10px; cursor: pointer; }
+    button.primary { background: #245a7a; border-color: #327aa3; }
+    button:disabled { opacity: .55; cursor: not-allowed; }
+    pre { margin: 0; padding: 12px; overflow: auto; background: #0b0e12; border: 1px solid #2a3039; border-radius: 6px; min-height: 180px; white-space: pre; }
+    #dashboard { display: grid; gap: 12px; }
+    .empty { border: 1px dashed #3a4656; border-radius: 6px; color: #96a3b5; padding: 22px; text-align: center; }
+    .cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
+    .metric { background: #171b22; border: 1px solid #2a3039; border-radius: 6px; padding: 12px; }
+    .metric span { color: #96a3b5; display: block; font-size: 12px; margin-bottom: 6px; }
+    .metric strong { display: block; font-size: 24px; }
+    .panel { background: #171b22; border: 1px solid #2a3039; border-radius: 6px; overflow: hidden; }
+    .panel h2 { margin: 0; padding: 12px; border-bottom: 1px solid #2a3039; }
+    table { width: 100%; border-collapse: collapse; font-size: 13px; }
+    th, td { border-bottom: 1px solid #242a33; padding: 9px 10px; text-align: left; vertical-align: top; }
+    th { background: #111419; color: #b7c2d0; font-weight: 600; position: sticky; top: 0; }
+    tr:last-child td { border-bottom: 0; }
+    .number { text-align: right; font-variant-numeric: tabular-nums; }
+    .pill { display: inline-block; border: 1px solid #3a4656; border-radius: 999px; color: #d9e3ee; background: #202733; padding: 2px 7px; margin: 0 4px 4px 0; font-size: 12px; }
+    .risk-high { color: #ff8d7a; }
+    .risk-mid { color: #ffd166; }
+    .risk-low { color: #7fe3a1; }
+    .bars { display: grid; gap: 9px; padding: 12px; }
+    .bar-row { display: grid; grid-template-columns: minmax(170px, 260px) 1fr 90px; gap: 10px; align-items: center; font-size: 13px; }
+    .bar-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #d9e3ee; }
+    .bar-track { height: 12px; background: #0f1217; border: 1px solid #2a3039; border-radius: 999px; overflow: hidden; }
+    .bar-fill { height: 100%; background: linear-gradient(90deg, #61dafb, #7fe3a1); border-radius: inherit; }
+    .bar-value { color: #b7c2d0; font-variant-numeric: tabular-nums; text-align: right; }
+    details { border: 1px solid #2a3039; border-radius: 6px; overflow: hidden; }
+    summary { cursor: pointer; padding: 10px 12px; background: #171b22; color: #b7c2d0; }
+    #raw { min-height: 220px; border-radius: 0; border-left: 0; border-right: 0; border-bottom: 0; }
+    .status { color: #b7c2d0; font-size: 13px; }
+    @media (max-width: 1100px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
+    @media (max-width: 820px) { main { grid-template-columns: 1fr; } aside { border-right: 0; border-bottom: 1px solid #2a3039; } .cards { grid-template-columns: 1fr; } }
+  </style>
+</head>
+<body>
+  <main>
+    <aside>
+      <h1>IWT2 PvP Sim</h1>
+      <h2>Scalars</h2>
+      <div class="grid">
+        <label>Gear <input id="gearLevel" type="number" value="5" min="0"></label>
+        <label>Boss count <input id="bossCount" type="number" value="2" min="1"></label>
+        <label>Boss HP % <input id="bossHpPercent" type="number" value="100" min="1"></label>
+        <label>Boss dmg % <input id="bossDamagePercent" type="number" value="100" min="1"></label>
+        <label>Stages <input id="stages" type="text" value="1,2"></label>
+        <label>Seconds <input id="seconds" type="number" value="180" min="1"></label>
+        <label>Workers <input id="workers" type="number" value="8" min="1"></label>
+        <label>Repeats <input id="repeats" type="number" value="1" min="1"></label>
+        <label>Top <input id="top" type="number" value="24" min="1"></label>
+      </div>
+
+      <h2>Classes</h2>
+      <label><input id="allClasses" type="checkbox" checked> All classes</label>
+      <div id="classes"></div>
+
+      <h2>Bosses</h2>
+      <label><input id="allBosses" type="checkbox" checked> All bosses</label>
+      <div id="bosses" class="bosses"></div>
+
+      <h2>Required Bosses</h2>
+      <div id="requiredBosses" class="bosses"></div>
+
+      <div id="estimate" class="estimate"></div>
+
+      <div class="buttons">
+        <button id="run" class="primary">Run</button>
+        <button id="stop" disabled>Stop</button>
+        <button id="copy">Copy Command</button>
+        <button id="save">Save JSON</button>
+      </div>
+    </aside>
+    <section>
+      <div id="status" class="status">Idle</div>
+      <div id="dashboard"><div class="empty">Run a simulation to see dashboard results.</div></div>
+      <details open>
+        <summary>Raw output</summary>
+        <pre id="raw"></pre>
+      </details>
+    </section>
+  </main>
+  <script>
+    const state = { lastJson: null, running: false, config: null };
+    const ids = ["gearLevel","bossCount","bossHpPercent","bossDamagePercent","stages","seconds","workers","repeats","top"];
+    const el = Object.fromEntries(ids.map(id => [id, document.getElementById(id)]));
+    const status = document.getElementById("status");
+    const raw = document.getElementById("raw");
+    const dashboard = document.getElementById("dashboard");
+    const estimateBox = document.getElementById("estimate");
+    const run = document.getElementById("run");
+    const stop = document.getElementById("stop");
+
+    fetch("/config").then(r => r.json()).then(config => {
+      state.config = config;
+      renderChecks("classes", config.classes, true);
+      renderChecks("bosses", config.bosses, true);
+      renderChecks("requiredBosses", config.bosses, false);
+      wireAll("allClasses", "classes");
+      wireAll("allBosses", "bosses");
+      wireEstimateUpdates();
+      updateEstimate();
+    });
+
+    function renderChecks(containerId, values, checked) {
+      const container = document.getElementById(containerId);
+      container.innerHTML = values.map(value => '<label><input type="checkbox" value="' + value + '"' + (checked ? ' checked' : '') + '> ' + value + '</label>').join("");
+    }
+
+    function wireAll(masterId, containerId) {
+      const master = document.getElementById(masterId);
+      const container = document.getElementById(containerId);
+      master.addEventListener("change", () => {
+        container.querySelectorAll("input").forEach(input => input.checked = master.checked);
+        updateEstimate();
+      });
+      container.addEventListener("change", () => {
+        master.checked = [...container.querySelectorAll("input")].every(input => input.checked);
+        updateEstimate();
+      });
+    }
+
+    function selected(containerId, masterId) {
+      if (document.getElementById(masterId).checked) return ["all"];
+      const values = [...document.getElementById(containerId).querySelectorAll("input:checked")].map(input => input.value);
+      return values.length ? values : ["all"];
+    }
+
+    function selectedRequiredBosses() {
+      const values = [...document.getElementById("requiredBosses").querySelectorAll("input:checked")].map(input => input.value);
+      return values.length ? values : ["none"];
+    }
+
+    function payload() {
+      const requiredBosses = selectedRequiredBosses();
+      let bosses = selected("bosses", "allBosses");
+      if (!bosses.includes("all") && !requiredBosses.includes("none")) {
+        bosses = [...new Set([...bosses, ...requiredBosses])];
+      }
+      return {
+        bossCount: el.bossCount.value,
+        bossDamagePercent: el.bossDamagePercent.value,
+        bossHpPercent: el.bossHpPercent.value,
+        bosses,
+        classes: selected("classes", "allClasses"),
+        gearLevel: el.gearLevel.value,
+        repeats: el.repeats.value,
+        requiredBosses,
+        seconds: el.seconds.value,
+        stages: el.stages.value,
+        top: el.top.value,
+        workers: el.workers.value,
+      };
+    }
+
+    function commandFor(options) {
+      return ["node", "scripts/iwt2-pvp-roguelike-boss-sim.mjs",
+        "--classes", options.classes.join(","),
+        "--gear-level", options.gearLevel,
+        "--boss-count", options.bossCount,
+        "--bosses", options.bosses.join(","),
+        "--boss-hp-percent", options.bossHpPercent,
+        "--boss-damage-percent", options.bossDamagePercent,
+        "--stages", options.stages,
+        "--seconds", options.seconds,
+        "--workers", options.workers,
+        "--repeats", options.repeats,
+        "--required-bosses", options.requiredBosses.join(","),
+        "--top", options.top,
+      ].join(" ");
+    }
+
+    function wireEstimateUpdates() {
+      document.querySelector("aside").addEventListener("input", updateEstimate);
+      document.querySelector("aside").addEventListener("change", updateEstimate);
+    }
+
+    function updateEstimate() {
+      if (!state.config) return;
+      const estimate = estimateFor(payload());
+      estimateBox.innerHTML = '<strong>' + number(estimate.trials) + ' tests</strong>' +
+        '<span>' + number(estimate.orderedBossGroupCount) + ' ordered boss groups x ' + number(estimate.classCount) + ' classes x ' + number(estimate.stageCount) + ' stages x ' + number(estimate.repeats) + ' repeats</span>' +
+        '<span>Max sim time: ' + duration(estimate.maxSimulatedSeconds) + ' / rough wall time: ' + duration(estimate.estimatedWallSeconds) + '</span>';
+    }
+
+    function estimateFor(options) {
+      const bossPool = options.bosses.includes("all") ? state.config.bosses : options.bosses;
+      const requiredBosses = options.requiredBosses.includes("none")
+        ? []
+        : options.requiredBosses.filter(bossId => bossPool.includes(bossId));
+      const bossCount = intValue(options.bossCount, 2);
+      const orderedBossGroupCount = countOrderedBossGroups(bossPool.length, bossCount, requiredBosses.length);
+      const classCount = options.classes.includes("all") ? state.config.classes.length : Math.max(1, options.classes.length);
+      const stageCount = Math.max(1, parseStages(options.stages).length);
+      const repeats = intValue(options.repeats, 1);
+      const seconds = numberValue(options.seconds, 180);
+      const workers = intValue(options.workers, 8);
+      const trials = orderedBossGroupCount * classCount * stageCount * repeats;
+      const maxSimulatedSeconds = trials * seconds;
+      const maxTicks = maxSimulatedSeconds * 30;
+      const estimatedWallSeconds = 0.8 + (maxTicks / (Math.max(1, workers) * 45000));
+      return { classCount, estimatedWallSeconds, maxSimulatedSeconds, orderedBossGroupCount, repeats, stageCount, trials };
+    }
+
+    function countOrderedBossGroups(poolSize, bossCount, requiredCount) {
+      const safeBossCount = Math.max(1, Math.min(poolSize, Math.floor(bossCount)));
+      if (requiredCount > safeBossCount || requiredCount > poolSize) return 0;
+      return combination(poolSize - requiredCount, safeBossCount - requiredCount) * permutation(safeBossCount, safeBossCount);
+    }
+
+    function combination(n, k) {
+      if (k < 0 || k > n) return 0;
+      const safeK = Math.min(k, n - k);
+      let result = 1;
+      for (let index = 1; index <= safeK; index += 1) {
+        result = (result * (n - safeK + index)) / index;
+      }
+      return Math.round(result);
+    }
+
+    function permutation(n, k) {
+      if (k < 0 || k > n) return 0;
+      let result = 1;
+      for (let value = n - k + 1; value <= n; value += 1) result *= value;
+      return result;
+    }
+
+    function parseStages(value) {
+      return String(value).split(",").map(stage => Number.parseInt(stage.trim(), 10)).filter(Number.isFinite);
+    }
+
+    function intValue(value, fallback) {
+      const parsed = Number.parseInt(value, 10);
+      return Number.isFinite(parsed) && parsed > 0 ? parsed : fallback;
+    }
+
+    function numberValue(value, fallback) {
+      const parsed = Number.parseFloat(value);
+      return Number.isFinite(parsed) && parsed > 0 ? parsed : fallback;
+    }
+
+    function duration(seconds) {
+      const safeSeconds = Math.max(0, Number(seconds) || 0);
+      if (safeSeconds < 60) return fixed(safeSeconds) + 's';
+      const minutes = Math.floor(safeSeconds / 60);
+      const remaining = Math.round(safeSeconds % 60);
+      if (minutes < 60) return minutes + 'm ' + remaining + 's';
+      const hours = Math.floor(minutes / 60);
+      return hours + 'h ' + (minutes % 60) + 'm';
+    }
+
+    function number(value) {
+      return Number(value ?? 0).toLocaleString();
+    }
+
+    run.addEventListener("click", async () => {
+      const options = payload();
+      const estimate = estimateFor(options);
+      raw.textContent = "$ " + commandFor(options) + "\\n" +
+        "# estimated tests: " + number(estimate.trials) + ", rough wall time: " + duration(estimate.estimatedWallSeconds) + "\\n\\n";
+      dashboard.innerHTML = '<div class="empty">Simulation running...</div>';
+      state.lastJson = null;
+      state.running = true;
+      run.disabled = true;
+      stop.disabled = false;
+      status.textContent = "Running " + number(estimate.trials) + " tests, rough estimate " + duration(estimate.estimatedWallSeconds) + "...";
+      const response = await fetch("/run", { method: "POST", headers: { "content-type": "application/json" }, body: JSON.stringify(options) });
+      if (!response.ok || !response.body) {
+        status.textContent = "Failed to start";
+        run.disabled = false;
+        stop.disabled = true;
+        return;
+      }
+      const reader = response.body.getReader();
+      const decoder = new TextDecoder();
+      let buffer = "";
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+        buffer += decoder.decode(value, { stream: true });
+        const parts = buffer.split("\\n\\n");
+        buffer = parts.pop() ?? "";
+        for (const part of parts) handleEvent(part);
+      }
+    });
+
+    function handleEvent(block) {
+      const lines = block.split("\\n");
+      const event = lines.find(line => line.startsWith("event:"))?.slice(6).trim();
+      const data = JSON.parse(lines.find(line => line.startsWith("data:"))?.slice(5) ?? "{}");
+      if (event === "chunk") {
+        raw.textContent += data.text;
+        raw.scrollTop = raw.scrollHeight;
+      } else if (event === "status") {
+        status.textContent = data.status;
+      } else if (event === "done") {
+        state.running = false;
+        run.disabled = false;
+        stop.disabled = true;
+        status.textContent = "Finished: exit " + data.code;
+        state.lastJson = data.json;
+        dashboard.innerHTML = data.json ? renderDashboard(JSON.parse(data.json)) : '<div class="empty">No JSON result found.</div>';
+      } else if (event === "error") {
+        status.textContent = data.error;
+      }
+    }
+
+    function renderDashboard(data) {
+      const combos = data.hardestCombos ?? [];
+      const stageCombos = data.hardestStageCombos ?? [];
+      const singleBosses = data.weakestSingleBosses ?? [];
+      const totalTrials = data.config?.orderedTrials ?? 0;
+      const totalFailures = combos.reduce((total, combo) => total + (combo.failures ?? 0), 0);
+      const worst = combos[0];
+      return [
+        '<div class="cards">',
+          metric('Trials', totalTrials),
+          metric('Elapsed', duration(data.config?.elapsedSeconds ?? 0)),
+          metric('Worst fail rate', worst ? percent(failRate(worst)) : 'n/a'),
+          metric('Gear / repeats', 'Gear +' + escapeHtml(data.config?.gearLevel ?? '?') + ' / ' + escapeHtml(data.config?.repeats ?? '?') + 'x'),
+        '</div>',
+        totalFailures === 0 ? '<div class="empty risk-low">No failures found in returned hardest-combo rows. Review deaths and fight time for near-fails.</div>' : '',
+        panel('Top Damage By Boss Mechanic', mechanicBars(data.topMechanics ?? [])),
+        panel('Hardest Combos', comboTable(combos, true)),
+        panel('Hardest By Stage', comboTable(stageCombos, false)),
+        panel('Bosses Associated With Most Risk', comboTable(singleBosses, true)),
+      ].join('');
+    }
+
+    function metric(label, value) {
+      return '<div class="metric"><span>' + escapeHtml(label) + '</span><strong>' + value + '</strong></div>';
+    }
+
+    function panel(title, content) {
+      return '<div class="panel"><h2>' + escapeHtml(title) + '</h2>' + content + '</div>';
+    }
+
+    function comboTable(rows, showDamage) {
+      if (!rows.length) return '<div class="empty">No rows.</div>';
+      return '<table><thead><tr>' +
+        '<th>Combo</th><th class="number">Fail</th><th class="number">Win</th><th class="number">Deaths</th><th class="number">Time</th><th class="number">Boss HP Left</th><th>Top Mechanic</th><th>Top Source</th>' +
+        '</tr></thead><tbody>' +
+        rows.map(row => '<tr>' +
+          '<td><strong>' + escapeHtml(row.key) + '</strong><br>' + outcomePills(row.outcomes) + '</td>' +
+          '<td class="number ' + riskClass(failRate(row)) + '">' + escapeHtml(row.failures ?? 0) + '/' + escapeHtml(row.trials ?? 0) + '</td>' +
+          '<td class="number">' + percent(row.winRate ?? 0) + '</td>' +
+          '<td class="number">' + fixed(row.avgDeaths) + '</td>' +
+          '<td class="number">' + fixed(row.avgSeconds) + 's</td>' +
+          '<td class="number">' + percent(row.avgRemainingBossHealth ?? 0) + '</td>' +
+          '<td>' + damagePills(row.topMechanics) + '</td>' +
+          '<td>' + (showDamage ? damagePills(row.topDamageSources) : damagePills(row.topDamageSources)) + '</td>' +
+        '</tr>').join('') +
+        '</tbody></table>';
+    }
+
+    function mechanicBars(sources) {
+      if (!sources.length) return '<div class="empty">No mechanic damage recorded.</div>';
+      const max = Math.max(...sources.map(source => Number(source.value) || 0), 1);
+      return '<div class="bars">' + sources.slice(0, 12).map(source => {
+        const value = Number(source.value) || 0;
+        const width = Math.max(2, (value / max) * 100);
+        return '<div class="bar-row">' +
+          '<div class="bar-label" title="' + escapeHtml(source.sourceId) + '">' + escapeHtml(source.sourceId) + '</div>' +
+          '<div class="bar-track"><div class="bar-fill" style="width:' + width + '%"></div></div>' +
+          '<div class="bar-value">' + fixed(value) + '</div>' +
+        '</div>';
+      }).join('') + '</div>';
+    }
+
+    function outcomePills(outcomes) {
+      if (!outcomes) return '';
+      return Object.entries(outcomes)
+        .map(([name, count]) => '<span class="pill">' + escapeHtml(name) + ': ' + escapeHtml(count) + '</span>')
+        .join('');
+    }
+
+    function damagePills(sources) {
+      if (!sources || sources.length === 0) return '<span class="pill">none</span>';
+      return sources.slice(0, 3)
+        .map(source => '<span class="pill">' + escapeHtml(source.sourceId) + ': ' + fixed(source.value) + '</span>')
+        .join('');
+    }
+
+    function failRate(row) {
+      return row.trials ? (row.failures ?? 0) / row.trials : 0;
+    }
+
+    function riskClass(rate) {
+      if (rate >= 0.5) return 'risk-high';
+      if (rate > 0) return 'risk-mid';
+      return 'risk-low';
+    }
+
+    function percent(value) {
+      return fixed(value * 100) + '%';
+    }
+
+    function fixed(value) {
+      const number = Number(value ?? 0);
+      return Number.isInteger(number) ? String(number) : number.toFixed(3).replace(/0+$/, '').replace(/\\.$/, '');
+    }
+
+    function escapeHtml(value) {
+      return String(value)
+        .replaceAll('&', '&amp;')
+        .replaceAll('<', '&lt;')
+        .replaceAll('>', '&gt;')
+        .replaceAll('"', '&quot;')
+        .replaceAll("'", '&#039;');
+    }
+
+    stop.addEventListener("click", () => {
+      fetch("/stop", { method: "POST" });
+      status.textContent = "Stopping...";
+    });
+
+    document.getElementById("copy").addEventListener("click", () => {
+      navigator.clipboard.writeText(commandFor(payload()));
+      status.textContent = "Command copied";
+    });
+
+    document.getElementById("save").addEventListener("click", () => {
+      if (!state.lastJson) return;
+      const blob = new Blob([state.lastJson], { type: "application/json" });
+      const link = document.createElement("a");
+      link.href = URL.createObjectURL(blob);
+      link.download = "iwt2-pvp-roguelike-sim.json";
+      link.click();
+      URL.revokeObjectURL(link.href);
+    });
+  </script>
+</body>
+</html>`)
+}
+
+function readJson(request) {
+  return new Promise((resolveRequest, rejectRequest) => {
+    let body = ''
+    request.on('data', (chunk) => {
+      body += chunk.toString()
+    })
+    request.on('end', () => {
+      try {
+        resolveRequest(body ? JSON.parse(body) : {})
+      } catch (error) {
+        rejectRequest(error)
+      }
+    })
+    request.on('error', rejectRequest)
+  })
+}
+
+function sendJson(response, value) {
+  response.writeHead(200, { 'content-type': 'application/json' })
+  response.end(JSON.stringify(value))
+}
+
+function writeEvent(response, event, data) {
+  response.write(`event: ${event}\n`)
+  response.write(`data: ${JSON.stringify(data)}\n\n`)
+}
+
+function listOrAll(value, allowed) {
+  if (!Array.isArray(value) || value.length === 0 || value.includes('all')) return 'all'
+  const selected = value.filter((item) => allowed.includes(item))
+  return selected.length ? selected.join(',') : 'all'
+}
+
+function listOrNone(value, allowed) {
+  if (!Array.isArray(value) || value.length === 0 || value.includes('none')) return 'none'
+  const selected = value.filter((item) => allowed.includes(item))
+  return selected.length ? selected.join(',') : 'none'
+}
+
+function scalar(value, fallback) {
+  return value === undefined || value === null || value === '' ? fallback : String(value)
+}
+
+function extractJson(output) {
+  const start = output.indexOf('{')
+  const end = output.lastIndexOf('}')
+  if (start < 0 || end < start) return ''
+  const candidate = output.slice(start, end + 1)
+  try {
+    return JSON.stringify(JSON.parse(candidate), null, 2)
+  } catch {
+    return ''
+  }
+}

scripts/iwt2_pvp_sim_gui.py

@@ -0,0 +1,344 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import json
+import queue
+import subprocess
+import threading
+from pathlib import Path
+try:
+    import tkinter as tk
+    from tkinter import filedialog, messagebox, ttk
+except ModuleNotFoundError:
+    print(
+        "This Python install does not include Tkinter.\n"
+        "Use the browser GUI instead:\n"
+        "  node scripts/iwt2-pvp-sim-gui-server.mjs\n"
+        "Then open http://localhost:8787\n"
+    )
+    raise SystemExit(1)
+
+
+ROOT = Path(__file__).resolve().parents[1]
+SIM_SCRIPT = ROOT / "scripts" / "iwt2-pvp-roguelike-boss-sim.mjs"
+
+HEALER_CLASSES = ["dawnweaver", "lifebinder", "runesage"]
+BOSS_IDS = [
+    "bulldrome",
+    "yian-kut-ku",
+    "great-jaggi",
+    "khezu",
+    "rathian",
+    "barroth",
+    "tobi-kadachi",
+    "rimebastion",
+    "ember-mantis-duelist",
+    "cinderback-ricochet",
+    "obsidian-ram-golem",
+    "stormcoil-wyrm",
+    "venom-orchid-hydra",
+    "sandglass-scorpion",
+    "crystal-bat-matriarch",
+    "hollowcrown-revenant",
+]
+
+
+class SimGui(tk.Tk):
+    def __init__(self) -> None:
+        super().__init__()
+        self.title("IWT2 PvP Roguelike Sim")
+        self.geometry("1120x780")
+        self.minsize(920, 640)
+
+        self.output_queue: queue.Queue[tuple[str, str | None]] = queue.Queue()
+        self.process: subprocess.Popen[str] | None = None
+        self.last_json = ""
+
+        self.class_vars = {name: tk.BooleanVar(value=True) for name in HEALER_CLASSES}
+        self.boss_vars = {boss_id: tk.BooleanVar(value=True) for boss_id in BOSS_IDS}
+        self.all_classes_var = tk.BooleanVar(value=True)
+        self.all_bosses_var = tk.BooleanVar(value=True)
+
+        self.gear_level_var = tk.StringVar(value="5")
+        self.boss_count_var = tk.StringVar(value="2")
+        self.hp_percent_var = tk.StringVar(value="100")
+        self.damage_percent_var = tk.StringVar(value="100")
+        self.stages_var = tk.StringVar(value="1,2")
+        self.seconds_var = tk.StringVar(value="180")
+        self.workers_var = tk.StringVar(value="8")
+        self.top_var = tk.StringVar(value="24")
+        self.status_var = tk.StringVar(value="Idle")
+
+        self._build_ui()
+        self.after(100, self._drain_output_queue)
+
+    def _build_ui(self) -> None:
+        self.columnconfigure(0, weight=0)
+        self.columnconfigure(1, weight=1)
+        self.rowconfigure(0, weight=1)
+
+        controls = ttk.Frame(self, padding=12)
+        controls.grid(row=0, column=0, sticky="nsew")
+
+        output_frame = ttk.Frame(self, padding=(0, 12, 12, 12))
+        output_frame.grid(row=0, column=1, sticky="nsew")
+        output_frame.columnconfigure(0, weight=1)
+        output_frame.rowconfigure(1, weight=1)
+
+        self._build_controls(controls)
+
+        output_header = ttk.Frame(output_frame)
+        output_header.grid(row=0, column=0, sticky="ew", pady=(0, 8))
+        output_header.columnconfigure(0, weight=1)
+        ttk.Label(output_header, textvariable=self.status_var).grid(row=0, column=0, sticky="w")
+        ttk.Button(output_header, text="Save JSON", command=self._save_json).grid(row=0, column=1, padx=(8, 0))
+        ttk.Button(output_header, text="Clear", command=self._clear_output).grid(row=0, column=2, padx=(8, 0))
+
+        self.output = tk.Text(output_frame, wrap="none", font=("Menlo", 11))
+        self.output.grid(row=1, column=0, sticky="nsew")
+        yscroll = ttk.Scrollbar(output_frame, orient="vertical", command=self.output.yview)
+        yscroll.grid(row=1, column=1, sticky="ns")
+        xscroll = ttk.Scrollbar(output_frame, orient="horizontal", command=self.output.xview)
+        xscroll.grid(row=2, column=0, sticky="ew")
+        self.output.configure(yscrollcommand=yscroll.set, xscrollcommand=xscroll.set)
+
+    def _build_controls(self, parent: ttk.Frame) -> None:
+        parent.columnconfigure(0, weight=1)
+
+        ttk.Label(parent, text="Simulation").grid(row=0, column=0, sticky="w")
+        scalar_grid = ttk.Frame(parent)
+        scalar_grid.grid(row=1, column=0, sticky="ew", pady=(8, 12))
+        for column in range(2):
+            scalar_grid.columnconfigure(column, weight=1)
+
+        fields = [
+            ("Gear level", self.gear_level_var),
+            ("Boss count", self.boss_count_var),
+            ("Boss HP %", self.hp_percent_var),
+            ("Boss damage %", self.damage_percent_var),
+            ("Stages", self.stages_var),
+            ("Seconds", self.seconds_var),
+            ("Workers", self.workers_var),
+            ("Top rows", self.top_var),
+        ]
+        for index, (label, variable) in enumerate(fields):
+            row = index // 2
+            column = (index % 2) * 2
+            ttk.Label(scalar_grid, text=label).grid(row=row, column=column, sticky="w", padx=(0, 6), pady=3)
+            ttk.Entry(scalar_grid, textvariable=variable, width=10).grid(row=row, column=column + 1, sticky="ew", pady=3)
+
+        ttk.Checkbutton(
+            parent,
+            text="All classes",
+            variable=self.all_classes_var,
+            command=self._toggle_all_classes,
+        ).grid(row=2, column=0, sticky="w")
+        class_frame = ttk.Frame(parent)
+        class_frame.grid(row=3, column=0, sticky="ew", pady=(4, 12))
+        for index, class_id in enumerate(HEALER_CLASSES):
+            ttk.Checkbutton(
+                class_frame,
+                text=class_id,
+                variable=self.class_vars[class_id],
+                command=self._sync_all_classes,
+            ).grid(row=0, column=index, sticky="w", padx=(0, 10))
+
+        ttk.Checkbutton(
+            parent,
+            text="All bosses",
+            variable=self.all_bosses_var,
+            command=self._toggle_all_bosses,
+        ).grid(row=4, column=0, sticky="w")
+
+        boss_canvas = tk.Canvas(parent, height=300, highlightthickness=0)
+        boss_scroll = ttk.Scrollbar(parent, orient="vertical", command=boss_canvas.yview)
+        boss_frame = ttk.Frame(boss_canvas)
+        boss_frame.bind(
+            "<Configure>",
+            lambda _event: boss_canvas.configure(scrollregion=boss_canvas.bbox("all")),
+        )
+        boss_canvas.create_window((0, 0), window=boss_frame, anchor="nw")
+        boss_canvas.configure(yscrollcommand=boss_scroll.set)
+        boss_canvas.grid(row=5, column=0, sticky="nsew", pady=(4, 12))
+        boss_scroll.grid(row=5, column=1, sticky="ns", pady=(4, 12))
+
+        for index, boss_id in enumerate(BOSS_IDS):
+            ttk.Checkbutton(
+                boss_frame,
+                text=boss_id,
+                variable=self.boss_vars[boss_id],
+                command=self._sync_all_bosses,
+            ).grid(row=index, column=0, sticky="w", pady=2)
+
+        button_row = ttk.Frame(parent)
+        button_row.grid(row=6, column=0, sticky="ew")
+        button_row.columnconfigure(0, weight=1)
+        self.run_button = ttk.Button(button_row, text="Run Simulation", command=self._start_sim)
+        self.run_button.grid(row=0, column=0, sticky="ew")
+        self.stop_button = ttk.Button(button_row, text="Stop", command=self._stop_sim, state="disabled")
+        self.stop_button.grid(row=0, column=1, padx=(8, 0))
+
+        ttk.Button(parent, text="Copy Command", command=self._copy_command).grid(row=7, column=0, sticky="ew", pady=(8, 0))
+
+    def _toggle_all_classes(self) -> None:
+        value = self.all_classes_var.get()
+        for variable in self.class_vars.values():
+            variable.set(value)
+
+    def _sync_all_classes(self) -> None:
+        self.all_classes_var.set(all(variable.get() for variable in self.class_vars.values()))
+
+    def _toggle_all_bosses(self) -> None:
+        value = self.all_bosses_var.get()
+        for variable in self.boss_vars.values():
+            variable.set(value)
+
+    def _sync_all_bosses(self) -> None:
+        self.all_bosses_var.set(all(variable.get() for variable in self.boss_vars.values()))
+
+    def _selected_classes(self) -> str:
+        if self.all_classes_var.get():
+            return "all"
+        selected = [name for name, variable in self.class_vars.items() if variable.get()]
+        return ",".join(selected) if selected else "all"
+
+    def _selected_bosses(self) -> str:
+        if self.all_bosses_var.get():
+            return "all"
+        selected = [boss_id for boss_id, variable in self.boss_vars.items() if variable.get()]
+        return ",".join(selected) if selected else "all"
+
+    def _command(self) -> list[str]:
+        return [
+            "node",
+            str(SIM_SCRIPT),
+            "--classes",
+            self._selected_classes(),
+            "--gear-level",
+            self.gear_level_var.get().strip() or "5",
+            "--boss-count",
+            self.boss_count_var.get().strip() or "2",
+            "--bosses",
+            self._selected_bosses(),
+            "--boss-hp-percent",
+            self.hp_percent_var.get().strip() or "100",
+            "--boss-damage-percent",
+            self.damage_percent_var.get().strip() or "100",
+            "--stages",
+            self.stages_var.get().strip() or "1,2",
+            "--seconds",
+            self.seconds_var.get().strip() or "180",
+            "--workers",
+            self.workers_var.get().strip() or "8",
+            "--top",
+            self.top_var.get().strip() or "24",
+        ]
+
+    def _start_sim(self) -> None:
+        if self.process is not None:
+            return
+        command = self._command()
+        self._clear_output()
+        self._append_output("$ " + " ".join(command) + "\n\n")
+        self.status_var.set("Running...")
+        self.run_button.configure(state="disabled")
+        self.stop_button.configure(state="normal")
+
+        thread = threading.Thread(target=self._run_subprocess, args=(command,), daemon=True)
+        thread.start()
+
+    def _run_subprocess(self, command: list[str]) -> None:
+        try:
+            self.process = subprocess.Popen(
+                command,
+                cwd=ROOT,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.STDOUT,
+                text=True,
+                bufsize=1,
+            )
+            assert self.process.stdout is not None
+            chunks: list[str] = []
+            for line in self.process.stdout:
+                chunks.append(line)
+                self.output_queue.put(("line", line))
+            exit_code = self.process.wait()
+            output = "".join(chunks)
+            self.output_queue.put(("done", json.dumps({"exitCode": exit_code, "output": output})))
+        except Exception as exc:  # noqa: BLE001
+            self.output_queue.put(("error", str(exc)))
+
+    def _drain_output_queue(self) -> None:
+        try:
+            while True:
+                kind, payload = self.output_queue.get_nowait()
+                if kind == "line" and payload is not None:
+                    self._append_output(payload)
+                elif kind == "done" and payload is not None:
+                    result = json.loads(payload)
+                    self.last_json = self._extract_json(result["output"])
+                    self.status_var.set(f"Finished: exit {result['exitCode']}")
+                    self.process = None
+                    self.run_button.configure(state="normal")
+                    self.stop_button.configure(state="disabled")
+                elif kind == "error" and payload is not None:
+                    self.status_var.set("Failed")
+                    self._append_output(f"\nERROR: {payload}\n")
+                    self.process = None
+                    self.run_button.configure(state="normal")
+                    self.stop_button.configure(state="disabled")
+        except queue.Empty:
+            pass
+        self.after(100, self._drain_output_queue)
+
+    def _stop_sim(self) -> None:
+        if self.process is None:
+            return
+        self.process.terminate()
+        self.status_var.set("Stopping...")
+
+    def _clear_output(self) -> None:
+        self.output.delete("1.0", "end")
+        self.last_json = ""
+
+    def _append_output(self, text: str) -> None:
+        self.output.insert("end", text)
+        self.output.see("end")
+
+    def _copy_command(self) -> None:
+        command = " ".join(self._command())
+        self.clipboard_clear()
+        self.clipboard_append(command)
+        self.status_var.set("Command copied")
+
+    def _save_json(self) -> None:
+        output = self.last_json or self._extract_json(self.output.get("1.0", "end"))
+        if not output:
+            messagebox.showinfo("No JSON", "Run a simulation first.")
+            return
+        path = filedialog.asksaveasfilename(
+            defaultextension=".json",
+            filetypes=[("JSON", "*.json"), ("All files", "*.*")],
+            initialfile="iwt2-pvp-roguelike-sim.json",
+        )
+        if not path:
+            return
+        Path(path).write_text(output, encoding="utf-8")
+        self.status_var.set(f"Saved {path}")
+
+    @staticmethod
+    def _extract_json(text: str) -> str:
+        start = text.find("{")
+        end = text.rfind("}")
+        if start < 0 or end < start:
+            return ""
+        candidate = text[start : end + 1]
+        try:
+            parsed = json.loads(candidate)
+        except json.JSONDecodeError:
+            return ""
+        return json.dumps(parsed, indent=2)
+
+
+if __name__ == "__main__":
+    SimGui().mainloop()

src/App.css

@@ -212,6 +212,8 @@
 }
 
 .iwt2-arena-layout {
+  display: grid;
+  grid-template-columns: 172px minmax(0, 1fr);
   height: 100vh;
   overflow: hidden;
   padding: 0;
@@ -221,6 +223,7 @@
 .iwt2-arena-stage {
   background: #090c10;
   border: 0;
+  grid-column: 2;
   height: 100%;
   min-height: 0;
   overflow: hidden;
@@ -233,6 +236,14 @@
   width: 100%;
 }
 
+.iwt2-arena-loading {
+  align-items: center;
+  color: var(--muted);
+  display: flex;
+  font-family: var(--pixel-font);
+  justify-content: center;
+}
+
 .iwt2-phaser-host canvas {
   display: block;
 }
@@ -317,6 +328,22 @@
   top: 0;
 }
 
+.iwt2-bar em {
+  color: #fff7df;
+  font-size: 0.56rem;
+  font-style: normal;
+  font-weight: 800;
+  left: 0;
+  line-height: 1;
+  pointer-events: none;
+  position: absolute;
+  right: 0;
+  text-align: center;
+  text-shadow: 0 1px 0 #050608;
+  top: 50%;
+  transform: translateY(-50%);
+}
+
 .iwt2-bar.boss span {
   background: #dc5162;
 }
@@ -337,17 +364,18 @@
 .iwt2-party-list {
   background: rgba(15, 19, 26, 0.88);
   border: 0;
-  left: 28px;
+  bottom: 0;
-  max-height: calc(100% - 112px);
+  left: 0;
+  max-height: none;
   outline: 0;
   padding: 6px;
-  position: absolute;
+  position: fixed;
-  top: 28px;
+  top: 0;
   width: 172px;
   z-index: 4;
   display: grid;
   gap: 8px;
-  align-content: start;
+  align-content: center;
   overflow: auto;
 }
 
@@ -1099,7 +1127,8 @@
 .iwt2-gear-class,
 .iwt2-gear-slot,
 .iwt2-infusion-row,
-.iwt2-gear-upgrade-button {
+.iwt2-gear-upgrade-button,
+.iwt2-gear-back {
   background: #151922;
   border: 2px solid #08090d;
   color: var(--ink);
@@ -1177,7 +1206,8 @@
 .iwt2-gear-class.game-selected,
 .iwt2-gear-slot.game-selected,
 .iwt2-infusion-row.game-selected,
-.iwt2-gear-upgrade-button.game-selected {
+.iwt2-gear-upgrade-button.game-selected,
+.iwt2-gear-back.game-selected {
   outline-color: #e5b95f;
 }
 
@@ -1187,6 +1217,12 @@
   text-align: center;
 }
 
+.iwt2-gear-back {
+  min-height: 36px;
+  padding: 8px 10px;
+  text-align: center;
+}
+
 .iwt2-gear-upgrade-button:disabled,
 .iwt2-infusion-row:disabled {
   color: var(--muted);
@@ -1401,6 +1437,10 @@
 }
 
 @media (max-width: 1000px) and (max-height: 620px) {
+  .iwt2-arena-layout {
+    grid-template-columns: 154px minmax(0, 1fr);
+  }
+
   .game-shell.iwt2-shell {
     padding: 6px 0;
     width: min(100%, calc(100% - 20px));
@@ -1640,6 +1680,11 @@
     padding: 7px 9px;
   }
 
+  .iwt2-gear-back {
+    min-height: 30px;
+    padding: 5px 8px;
+  }
+
   .iwt2-gear-detail {
     gap: 6px;
     padding: 7px;
@@ -1735,20 +1780,22 @@
   }
 
   .iwt2-party-list {
-    gap: 5px;
+    align-content: center;
-    left: 10px;
+    gap: 7px;
-    max-height: calc(100% - 84px);
+    bottom: 0;
+    left: 0;
+    max-height: none;
     overflow: hidden;
     padding: 4px;
-    top: 10px;
+    top: 0;
     width: 154px;
   }
 
   .iwt2-party-row {
     gap: 5px;
     grid-template-columns: 22px minmax(0, 1fr);
-    height: 62px;
+    height: 70px;
-    min-height: 62px;
+    min-height: 70px;
     padding: 4px;
   }
 
@@ -1782,8 +1829,12 @@
   }
 
   .iwt2-party-row .iwt2-bar {
-    height: 7px;
+    height: 12px;
-    margin-top: 2px;
+    margin-top: 3px;
+  }
+
+  .iwt2-party-row .iwt2-bar.mana {
+    height: 8px;
   }
 
   .iwt2-party-effects {
@@ -1803,6 +1854,7 @@
 
   .iwt2-ability-bar {
     bottom: 8px;
+    display: none;
     gap: 8px;
     grid-template-columns: repeat(6, 36px);
     max-width: 256px;
@@ -1829,6 +1881,497 @@
   }
 }
 
+/* IWT2 startup save gateway */
+.save-gateway-shell {
+  align-items: stretch;
+  height: 100dvh;
+  min-height: 0;
+  overflow: auto;
+  padding: 14px;
+}
+
+.save-gateway-panel {
+  background: rgba(17, 19, 25, 0.96);
+  border: 3px solid #08090c;
+  box-shadow: 8px 8px 0 #050609;
+  display: grid;
+  gap: 12px;
+  grid-template-rows: auto minmax(0, 1fr) auto auto;
+  margin: auto;
+  max-width: 1080px;
+  min-height: min(512px, calc(100dvh - 28px));
+  outline: 2px solid #4a4653;
+  padding: 16px;
+  width: 100%;
+}
+
+.save-gateway-heading {
+  align-items: end;
+  border-bottom: 2px solid #34343d;
+  display: flex;
+  gap: 22px;
+  justify-content: space-between;
+  padding: 0 2px 10px;
+}
+
+.save-gateway-heading h1 {
+  color: var(--ink);
+  font-family: var(--pixel-font);
+  font-size: clamp(24px, 4vw, 38px);
+  line-height: 1;
+  margin: 4px 0 0;
+}
+
+.save-gateway-heading > p {
+  color: var(--muted);
+  font-size: 14px;
+  line-height: 1.25;
+  margin: 0;
+  max-width: 440px;
+  text-align: right;
+}
+
+.save-option-grid {
+  display: grid;
+  gap: 12px;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  min-height: 0;
+}
+
+.save-option-card {
+  background: #151921;
+  border: 2px solid #090a0d;
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  min-width: 0;
+  outline: 2px solid #3a4250;
+  padding: 12px;
+}
+
+.local-save-card {
+  border-top-color: #5eaf7e;
+}
+
+.new-save-card {
+  border-top-color: #d8af58;
+}
+
+.online-save-card {
+  border-top-color: #5799db;
+}
+
+.save-option-heading {
+  align-items: center;
+  display: flex;
+  gap: 10px;
+}
+
+.save-option-heading > span {
+  align-items: center;
+  background: #202938;
+  border: 2px solid #090a0d;
+  color: var(--gold);
+  display: inline-flex;
+  flex: 0 0 42px;
+  font-family: var(--pixel-font);
+  height: 42px;
+  justify-content: center;
+  outline: 1px solid #4c5667;
+}
+
+.online-save-panel .save-option-heading > span {
+  color: #80bdf2;
+}
+
+.save-option-heading h2 {
+  color: var(--ink);
+  font-family: var(--pixel-font);
+  font-size: 15px;
+  line-height: 1.15;
+  margin: 3px 0 0;
+}
+
+.save-character-name {
+  color: var(--ink);
+  display: block;
+  font-size: 19px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.save-metadata {
+  display: grid;
+  gap: 7px;
+  margin: 0;
+}
+
+.save-metadata > div {
+  background: #101219;
+  border-left: 3px solid #4b5363;
+  display: grid;
+  gap: 3px;
+  padding: 7px 9px;
+}
+
+.save-metadata dt {
+  color: var(--muted);
+  font-family: var(--pixel-font);
+  font-size: 7px;
+  text-transform: uppercase;
+}
+
+.save-metadata dd {
+  color: var(--ink);
+  font-size: 14px;
+  line-height: 1.15;
+  margin: 0;
+}
+
+.save-empty-state {
+  align-items: center;
+  background: #101219;
+  border-left: 3px solid #4b5363;
+  color: var(--muted);
+  display: flex;
+  flex: 1;
+  font-size: 14px;
+  line-height: 1.25;
+  margin: 0;
+  min-height: 58px;
+  padding: 12px;
+}
+
+.save-continue-button,
+.save-secondary-button {
+  border: 2px solid #090a0d;
+  cursor: pointer;
+  font-family: var(--pixel-font);
+  font-size: 8px;
+  line-height: 1.2;
+  min-height: 42px;
+  padding: 8px 10px;
+  width: 100%;
+}
+
+.slot-save-actions {
+  display: grid;
+  gap: 7px;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  margin-top: auto;
+}
+
+.slot-save-actions .save-continue-button {
+  margin-top: 0;
+}
+
+.character-create-form {
+  display: flex;
+  flex: 1;
+  flex-direction: column;
+  gap: 9px;
+  min-height: 0;
+}
+
+.character-create-form label,
+.online-save-destination {
+  color: var(--muted);
+  display: grid;
+  font-family: var(--pixel-font);
+  font-size: 7px;
+  gap: 5px;
+  text-transform: uppercase;
+}
+
+.character-create-form input,
+.online-save-destination select {
+  background: #0e1016;
+  border: 2px solid #090a0d;
+  color: var(--ink);
+  font: 16px var(--body-font);
+  min-height: 38px;
+  outline: 2px solid #3e3d47;
+  padding: 7px 9px;
+  width: 100%;
+}
+
+.character-create-form > small {
+  color: var(--muted);
+  font-size: 12px;
+  line-height: 1.2;
+}
+
+.online-save-panel {
+  align-items: center;
+  background: #131821;
+  border: 2px solid #090a0d;
+  border-top-color: #5799db;
+  display: grid;
+  gap: 12px;
+  grid-template-columns: 130px minmax(260px, 1fr) 160px minmax(170px, 210px);
+  min-width: 0;
+  outline: 2px solid #3a4250;
+  padding: 10px 12px;
+}
+
+.online-save-heading {
+  min-width: 0;
+}
+
+.online-save-summary {
+  align-items: center;
+  display: grid;
+  gap: 8px;
+  grid-template-columns: minmax(75px, 0.7fr) minmax(0, 1.8fr);
+  min-width: 0;
+}
+
+.online-save-summary .save-character-name {
+  font-size: 16px;
+}
+
+.online-save-summary .save-metadata {
+  gap: 5px;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+
+.online-save-summary .save-metadata > div {
+  padding: 5px 7px;
+}
+
+.online-save-summary .save-metadata dd {
+  font-size: 11px;
+}
+
+.online-save-summary .save-empty-state {
+  min-height: 48px;
+}
+
+.save-continue-button {
+  background: var(--gold);
+  color: #19150e;
+  margin-top: auto;
+  outline: 2px solid #816630;
+}
+
+.save-continue-button.danger {
+  background: var(--red-bright);
+  color: #fff6ee;
+  outline-color: #8d2b38;
+}
+
+.save-continue-button:disabled,
+.save-secondary-button:disabled {
+  cursor: not-allowed;
+  filter: grayscale(0.8);
+  opacity: 0.45;
+}
+
+.save-secondary-button {
+  background: #242630;
+  color: var(--muted);
+  outline: 2px solid #4b4855;
+}
+
+.online-save-login {
+  display: grid;
+  gap: 9px;
+  grid-column: 2 / -1;
+  grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(180px, 0.75fr);
+  margin: 0;
+}
+
+.online-save-login label {
+  color: var(--muted);
+  display: grid;
+  font-family: var(--pixel-font);
+  font-size: 7px;
+  gap: 5px;
+  text-transform: uppercase;
+}
+
+.online-save-login input {
+  background: #0e1016;
+  border: 2px solid #090a0d;
+  color: var(--ink);
+  font: 16px var(--body-font);
+  min-height: 38px;
+  outline: 2px solid #3e3d47;
+  padding: 7px 9px;
+  width: 100%;
+}
+
+.online-save-actions {
+  display: grid;
+  gap: 7px;
+  margin-top: auto;
+}
+
+.online-save-actions .save-continue-button {
+  margin-top: 0;
+}
+
+.save-gateway-status {
+  color: #a9d7b8;
+  font-size: 13px;
+  line-height: 1.2;
+  margin: 0;
+  min-height: 16px;
+  padding: 0 2px;
+}
+
+.save-gateway-status.error {
+  color: #ff8190;
+}
+
+@media (max-width: 800px) {
+  .auth-shell.save-gateway-shell {
+    align-items: flex-start;
+    overflow: auto;
+  }
+
+  .save-gateway-panel {
+    min-height: auto;
+  }
+
+  .save-gateway-heading {
+    align-items: flex-start;
+    flex-direction: column;
+    gap: 8px;
+  }
+
+  .save-gateway-heading > p {
+    text-align: left;
+  }
+
+  .save-option-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .online-save-panel {
+    align-items: stretch;
+    grid-template-columns: 1fr;
+  }
+
+  .online-save-login {
+    grid-column: auto;
+    grid-template-columns: 1fr;
+  }
+
+  .online-save-summary {
+    grid-template-columns: 1fr;
+  }
+}
+
+@media (max-width: 1000px) and (max-height: 620px) {
+  .save-gateway-shell {
+    overflow: hidden;
+    padding: 10px;
+  }
+
+  .save-gateway-panel {
+    gap: 9px;
+    min-height: calc(100dvh - 20px);
+    padding: 11px;
+  }
+
+  .save-gateway-heading {
+    padding-bottom: 7px;
+  }
+
+  .save-gateway-heading h1 {
+    font-size: 25px;
+  }
+
+  .save-gateway-heading > p {
+    font-size: 12px;
+  }
+
+  .save-option-grid {
+    gap: 9px;
+  }
+
+  .save-option-card {
+    gap: 6px;
+    padding: 8px;
+  }
+
+  .save-option-heading > span {
+    flex-basis: 36px;
+    height: 36px;
+  }
+
+  .save-option-heading h2 {
+    font-size: 13px;
+  }
+
+  .save-character-name {
+    font-size: 16px;
+  }
+
+  .save-metadata {
+    gap: 5px;
+  }
+
+  .save-metadata > div {
+    padding: 5px 7px;
+  }
+
+  .save-metadata dd {
+    font-size: 12px;
+  }
+
+  .save-continue-button,
+  .save-secondary-button {
+    min-height: 34px;
+    padding: 6px 8px;
+  }
+
+  .slot-save-actions {
+    gap: 5px;
+  }
+
+  .character-create-form {
+    gap: 6px;
+  }
+
+  .character-create-form input,
+  .online-save-destination select {
+    font-size: 14px;
+    min-height: 32px;
+    padding: 5px 7px;
+  }
+
+  .character-create-form > small {
+    font-size: 10px;
+  }
+
+  .online-save-panel {
+    gap: 8px;
+    grid-template-columns: 115px minmax(230px, 1fr) 145px minmax(160px, 190px);
+    padding: 7px 9px;
+  }
+
+  .online-save-summary {
+    gap: 5px;
+  }
+
+  .online-save-login {
+    gap: 6px;
+  }
+
+  .online-save-login input {
+    font-size: 14px;
+    min-height: 32px;
+    padding: 5px 7px;
+  }
+
+  .save-gateway-status {
+    font-size: 11px;
+  }
+}
+
 .combat-touch-lock-status {
   background: #101216;
   border: 2px solid #d9b55a;

src/App.tsx

@@ -1,159 +1,45 @@
-import { useCallback, useEffect, useState } from 'react'
+import { lazy, Suspense, useState } from 'react'
 import { AuthScreen } from './components/AuthScreen'
-import IWantToHeal1App from './modes/iwt1/IWantToHeal1App'
+import type { Iwt2LocalSaveSlot, Iwt2Save } from './modes/iwt2/save/iwt2Repository'
-import { IWantToHeal2App } from './modes/iwt2/IWantToHeal2App'
-import { useGameAction } from './input'
-import {
-  loadAuthSession,
-  type AuthSession,
-} from './profile'
 
-type GameVersion = 'iwt1' | 'iwt2'
+const LazyIWantToHeal2App = lazy(() => import('./modes/iwt2/IWantToHeal2App').then((module) => ({
+  default: module.IWantToHeal2App,
+})))
 
-const GAME_OPTIONS: Array<{
+type Iwt2Launch = {
-  version: GameVersion
+  localSlot: Iwt2LocalSaveSlot
-  title: string
+  onlineBackupsAvailable: boolean
-  label: string
+  save: Iwt2Save
-  description: string
+}
-  glyph: string
-}> = [
-  {
-    version: 'iwt1',
-    title: 'I Want To Heal 1',
-    label: 'Classic Healer Runs',
-    description: 'Original dungeon, raid, roguelike, PvP, gear, talents, and collection progression.',
-    glyph: 'I',
-  },
-  {
-    version: 'iwt2',
-    title: 'I Want To Heal 2',
-    label: '2D Boss Arena',
-    description: 'Move through boss arenas with a visible party, analog movement, projectiles, and separate progression.',
-    glyph: 'II',
-  },
-]
 
 function App() {
-  const [selectedVersion, setSelectedVersion] = useState<GameVersion | null>(null)
+  const [launch, setLaunch] = useState<Iwt2Launch | null>(null)
-  const [selectedIndex, setSelectedIndex] = useState(0)
-  const [authSession, setAuthSession] = useState<AuthSession | null>(null)
-  const [authChecked, setAuthChecked] = useState(false)
-  const [serverMessage, setServerMessage] = useState('')
 
-  useEffect(() => {
+  if (launch) {
-    let cancelled = false
-    loadAuthSession()
-      .then((session) => {
-        if (cancelled) return
-        setAuthSession(session.account && session.profile ? session : null)
-      })
-      .catch((reason: unknown) => {
-        if (cancelled) return
-        setServerMessage(
-          reason instanceof Error
-            ? `${reason.message} Offline play is still available.`
-            : 'Unable to reach the server. Offline play is still available.',
-        )
-      })
-      .finally(() => {
-        if (!cancelled) setAuthChecked(true)
-      })
-    return () => {
-      cancelled = true
-    }
-  }, [])
-
-  const acceptSession = useCallback((session: AuthSession) => {
-    setAuthSession(session)
-    setSelectedVersion(null)
-    setServerMessage('')
-  }, [])
-
-  const clearAuthSession = useCallback(() => {
-    setAuthSession(null)
-    setSelectedVersion(null)
-  }, [])
-
-  useGameAction((action, device) => {
-    if (!authSession || selectedVersion || device !== 'controller') return
-    if (action === 'navigateLeft' || action === 'navigateUp') {
-      setSelectedIndex((current) => Math.max(0, current - 1))
-    } else if (action === 'navigateRight' || action === 'navigateDown') {
-      setSelectedIndex((current) => Math.min(GAME_OPTIONS.length - 1, current + 1))
-    } else if (action === 'confirm') {
-      setSelectedVersion(GAME_OPTIONS[selectedIndex].version)
-    }
-  })
-
-  if (!authChecked) {
     return (
-      <main className="game-shell">
+      <Suspense fallback={<Iwt2LaunchFallback />}>
-        <section className="message-panel">
+        <LazyIWantToHeal2App
-          <p className="eyebrow">Opening Chronicle</p>
+          initialSave={launch.save}
+          localSlot={launch.localSlot}
+          onlineBackupsAvailable={launch.onlineBackupsAvailable}
+          onExitToSaveSelect={() => setLaunch(null)}
+        />
+      </Suspense>
+    )
+  }
+
+  return <AuthScreen onContinue={setLaunch} />
+}
+
+function Iwt2LaunchFallback() {
+  return (
+    <main className="game-shell iwt2-shell">
+      <section className="message-panel" aria-live="polite">
+        <p className="eyebrow">I Want To Heal 2</p>
         <h1>Loading...</h1>
       </section>
     </main>
   )
-  }
-
-  if (!authSession) {
-    return (
-      <AuthScreen
-        onAuthenticated={acceptSession}
-        serverMessage={serverMessage}
-      />
-    )
-  }
-
-  if (selectedVersion === 'iwt1') {
-    return (
-      <IWantToHeal1App
-        initialSession={authSession}
-        onAuthenticationCleared={clearAuthSession}
-        onBackToGameSelect={() => setSelectedVersion(null)}
-      />
-    )
-  }
-
-  if (selectedVersion === 'iwt2') {
-    return (
-      <IWantToHeal2App
-        onlineBackupsAvailable={authSession.account?.id !== -1}
-        onBackToGameSelect={() => setSelectedVersion(null)}
-      />
-    )
-  }
-
-  return (
-    <main className="game-shell game-version-shell">
-      <section className="game-version-screen" data-game-nav-active="true">
-        <div className="game-version-heading">
-          <p className="eyebrow">Select Game</p>
-          <h1>I Want To Heal</h1>
-        </div>
-        <div className="game-version-grid">
-          {GAME_OPTIONS.map((option, index) => (
-            <button
-              className={`game-version-card ${selectedIndex === index ? 'game-selected' : ''}`}
-              data-controller-nav="skip"
-              data-game-selected={selectedIndex === index ? 'true' : undefined}
-              key={option.version}
-              onClick={() => setSelectedVersion(option.version)}
-              onPointerDown={() => setSelectedIndex(index)}
-              type="button"
-            >
-              <span>{option.glyph}</span>
-              <div>
-                <strong>{option.title}</strong>
-                <small>{option.label}</small>
-                <p>{option.description}</p>
-              </div>
-            </button>
-          ))}
-        </div>
-      </section>
-    </main>
-  )
 }
 
 export default App

src/components/AuthScreen.tsx

@@ -1,99 +1,381 @@
-import { useState } from 'react'
+import { useCallback, useEffect, useState } from 'react'
 import {
+  loadAuthSession,
   loginAccount,
-  registerAccount,
+  logoutAccount,
-  type AuthSession,
+  type Account,
 } from '../profile'
+import { selectOfflineMode, selectOnlineMode } from '../gameRepository'
 import {
-  createOfflineCharacter,
+  createDefaultIwt2Save,
-  hasOfflineCharacter,
+  IWT2_LOCAL_SAVE_SLOTS,
-  resumeOfflineCharacter,
+  loadIwt2OnlineSave,
-  selectOnlineMode,
+  loadIwt2SaveSlots,
-} from '../gameRepository'
+  replaceIwt2Save,
+  selectActiveIwt2SaveSlot,
+  type Iwt2LocalSaveSlot,
+  type Iwt2LocalSaveSlots,
+  type Iwt2Save,
+} from '../modes/iwt2/save/iwt2Repository'
 
-type Props = {
+type Iwt2Launch = {
-  onAuthenticated: (session: AuthSession) => void
+  localSlot: Iwt2LocalSaveSlot
-  serverMessage?: string
+  onlineBackupsAvailable: boolean
+  save: Iwt2Save
 }
 
-export function AuthScreen({ onAuthenticated, serverMessage = '' }: Props) {
+type Props = {
-  const [mode, setMode] = useState<'login' | 'register'>('login')
+  onContinue: (launch: Iwt2Launch) => void
+}
+
+const IWT2_CHARACTER_NAME_PATTERN = /^[A-Za-z][A-Za-z0-9 -]{1,17}$/
+
+function formatSaveTimestamp(updatedAt: number) {
+  return new Intl.DateTimeFormat(undefined, {
+    dateStyle: 'medium',
+    timeStyle: 'short',
+  }).format(new Date(updatedAt))
+}
+
+function SaveMetadata({ save }: { save: Iwt2Save }) {
+  return (
+    <dl className="save-metadata">
+      <div>
+        <dt>Last updated</dt>
+        <dd>
+          <time dateTime={new Date(save.updatedAt).toISOString()}>
+            {formatSaveTimestamp(save.updatedAt)}
+          </time>
+        </dd>
+      </div>
+      <div>
+        <dt>Character XP</dt>
+        <dd>{save.character.experience.toLocaleString()} XP</dd>
+      </div>
+    </dl>
+  )
+}
+
+function firstEmptySlot(saves: Iwt2LocalSaveSlots): Iwt2LocalSaveSlot {
+  return IWT2_LOCAL_SAVE_SLOTS.find((slot) => !saves[slot]) ?? 1
+}
+
+export function AuthScreen({ onContinue }: Props) {
+  const [localSaves] = useState(loadIwt2SaveSlots)
+  const [editingSlot, setEditingSlot] = useState<Iwt2LocalSaveSlot | null>(null)
+  const [characterName, setCharacterName] = useState('')
+  const [account, setAccount] = useState<Account | null>(null)
+  const [onlineSave, setOnlineSave] = useState<Iwt2Save | null>(null)
+  const [onlineDestinationSlot, setOnlineDestinationSlot] = useState<Iwt2LocalSaveSlot>(
+    () => firstEmptySlot(localSaves),
+  )
+  const [confirmOnlineDestination, setConfirmOnlineDestination] = useState<Iwt2LocalSaveSlot | null>(null)
   const [username, setUsername] = useState('')
   const [password, setPassword] = useState('')
-  const [characterName, setCharacterName] = useState('')
+  const [checkingSession, setCheckingSession] = useState(true)
-  const [offlineName, setOfflineName] = useState('')
+  const [checkingOnlineSave, setCheckingOnlineSave] = useState(false)
-  const [busy, setBusy] = useState(false)
+  const [submitting, setSubmitting] = useState(false)
-  const [message, setMessage] = useState('')
+  const [message, setMessage] = useState('Choose a slot or sign in to inspect the online save.')
-  const offlineCharacterExists = hasOfflineCharacter()
+  const [messageIsError, setMessageIsError] = useState(false)
 
-  async function submit(event: React.FormEvent) {
+  const inspectOnlineSave = useCallback(async (cancelled: () => boolean = () => false) => {
+    setCheckingOnlineSave(true)
+    try {
+      const result = await loadIwt2OnlineSave()
+      if (cancelled()) return
+      setOnlineSave(result.save)
+      setMessage(result.save ? 'Online save ready. Choose its local destination slot.' : 'Account has no online IWT2 save yet.')
+      setMessageIsError(false)
+    } catch (reason) {
+      if (cancelled()) return
+      setOnlineSave(null)
+      setMessage(reason instanceof Error ? reason.message : 'Unable to check online save.')
+      setMessageIsError(true)
+    } finally {
+      if (!cancelled()) setCheckingOnlineSave(false)
+    }
+  }, [])
+
+  useEffect(() => {
+    let cancelled = false
+    selectOnlineMode()
+    loadAuthSession()
+      .then((session) => {
+        if (cancelled || !session.account) return
+        setAccount(session.account)
+        return inspectOnlineSave(() => cancelled)
+      })
+      .catch((reason: unknown) => {
+        if (cancelled) return
+        setMessage(
+          reason instanceof Error
+            ? `${reason.message} Local slots remain available.`
+            : 'Online service unavailable. Local slots remain available.',
+        )
+        setMessageIsError(true)
+      })
+      .finally(() => {
+        if (!cancelled) setCheckingSession(false)
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [inspectOnlineSave])
+
+  function continueLocal(slot: Iwt2LocalSaveSlot) {
+    const save = localSaves[slot]
+    if (!save) return
+    selectActiveIwt2SaveSlot(slot)
+    selectOfflineMode()
+    onContinue({ localSlot: slot, save, onlineBackupsAvailable: false })
+  }
+
+  function openCharacterEditor(slot: Iwt2LocalSaveSlot) {
+    setEditingSlot(slot)
+    setCharacterName('')
+    setMessage(localSaves[slot]
+      ? `Creating a new character will replace Slot ${slot}.`
+      : `Enter a name for the new character in Slot ${slot}.`)
+    setMessageIsError(false)
+  }
+
+  function createCharacter(event: React.FormEvent, slot: Iwt2LocalSaveSlot) {
     event.preventDefault()
-    setBusy(true)
+    const name = characterName.trim()
-    setMessage('')
+    if (!IWT2_CHARACTER_NAME_PATTERN.test(name)) {
+      setMessage('Character name must be 2–18 characters, start with a letter, and use letters, numbers, spaces, or hyphens.')
+      setMessageIsError(true)
+      return
+    }
+    const save = createDefaultIwt2Save(name)
+    replaceIwt2Save(save, slot)
+    selectActiveIwt2SaveSlot(slot)
+    selectOfflineMode()
+    onContinue({ localSlot: slot, save, onlineBackupsAvailable: false })
+  }
+
+  async function signIn(event: React.FormEvent) {
+    event.preventDefault()
+    setSubmitting(true)
+    setMessage('Signing in and checking online save...')
+    setMessageIsError(false)
     try {
       selectOnlineMode()
-      const session = mode === 'login'
+      const session = await loginAccount(username, password)
-        ? await loginAccount(username, password)
+      if (!session.account) throw new Error('Account session was not returned.')
-        : await registerAccount(username, password, characterName)
+      setAccount(session.account)
-      onAuthenticated(session)
+      await inspectOnlineSave()
     } catch (reason) {
-      setMessage(reason instanceof Error ? reason.message : 'Unable to authenticate.')
+      setAccount(null)
+      setOnlineSave(null)
+      setMessage(reason instanceof Error ? reason.message : 'Unable to sign in.')
+      setMessageIsError(true)
     } finally {
-      setBusy(false)
+      setSubmitting(false)
     }
   }
 
-  function beginOffline() {
+  function continueOnline() {
-    setMessage('')
+    if (!account || !onlineSave) return
+    const destinationSave = localSaves[onlineDestinationSlot]
+    if (destinationSave && confirmOnlineDestination !== onlineDestinationSlot) {
+      setConfirmOnlineDestination(onlineDestinationSlot)
+      setMessage(`Online save will replace ${destinationSave.character.name} in Slot ${onlineDestinationSlot}. Select again to confirm.`)
+      setMessageIsError(false)
+      return
+    }
+    replaceIwt2Save(onlineSave, onlineDestinationSlot)
+    selectActiveIwt2SaveSlot(onlineDestinationSlot)
+    selectOnlineMode()
+    onContinue({
+      localSlot: onlineDestinationSlot,
+      onlineBackupsAvailable: true,
+      save: onlineSave,
+    })
+  }
+
+  async function handleDifferentAccount() {
+    setSubmitting(true)
     try {
-      onAuthenticated(createOfflineCharacter(offlineName))
+      await logoutAccount()
+      setAccount(null)
+      setOnlineSave(null)
+      setPassword('')
+      setMessage('Signed out. Enter account credentials to load another online save.')
+      setMessageIsError(false)
     } catch (reason) {
-      setMessage(reason instanceof Error ? reason.message : 'Unable to create an offline character.')
+      setMessage(reason instanceof Error ? reason.message : 'Unable to sign out.')
+      setMessageIsError(true)
+    } finally {
+      setSubmitting(false)
     }
   }
 
-  function resumeOffline() {
+  const onlineBusy = checkingSession || checkingOnlineSave || submitting
-    const session = resumeOfflineCharacter()
-    if (session) onAuthenticated(session)
-  }
 
   return (
-    <main className="auth-shell">
+    <main className="auth-shell save-gateway-shell">
-      <section className="auth-panel">
+      <section className="save-gateway-panel">
-        <div className="auth-brand">
+        <header className="save-gateway-heading">
-          <p className="eyebrow">Healer RPG</p>
+          <div>
-          <h1>I want to Heal</h1>
+            <p className="eyebrow">I Want To Heal 2</p>
-          <p>
+            <h1>Choose Character</h1>
-            Build your healer, master each dungeon, and compete for the most
+          </div>
-            efficient clears.
+          <p>Three local slots. Each character keeps separate progress, timestamp, and XP.</p>
+        </header>
+
+        <div className="save-option-grid">
+          {IWT2_LOCAL_SAVE_SLOTS.map((slot) => {
+            const save = localSaves[slot]
+            const editing = editingSlot === slot
+            return (
+              <article className={`save-option-card local-save-card ${save ? '' : 'empty'}`} key={slot}>
+                <div className="save-option-heading">
+                  <span aria-hidden="true">{slot}</span>
+                  <div>
+                    <p className="eyebrow">Local Save</p>
+                    <h2>Slot {slot}</h2>
+                  </div>
+                </div>
+
+                {editing ? (
+                  <form className="character-create-form" onSubmit={(event) => createCharacter(event, slot)}>
+                    <label>
+                      Character Name
+                      <input
+                        autoFocus
+                        maxLength={18}
+                        minLength={2}
+                        onChange={(event) => setCharacterName(event.target.value)}
+                        pattern="[A-Za-z][A-Za-z0-9 \-]{1,17}"
+                        placeholder="Mira"
+                        required
+                        value={characterName}
+                      />
+                    </label>
+                    <small>
+                      {save ? `Replaces ${save.character.name} in this slot.` : 'Creates a fresh Level 1 character.'}
+                    </small>
+                    <div className="slot-save-actions">
+                      <button
+                        className={`save-continue-button ${save ? 'danger' : ''}`}
+                        type="submit"
+                      >
+                        {save ? `Replace Slot ${slot}` : `Create in Slot ${slot}`}
+                      </button>
+                      <button
+                        className="save-secondary-button"
+                        onClick={() => setEditingSlot(null)}
+                        type="button"
+                      >
+                        Cancel
+                      </button>
+                    </div>
+                  </form>
+                ) : save ? (
+                  <>
+                    <strong className="save-character-name">{save.character.name}</strong>
+                    <SaveMetadata save={save} />
+                    <div className="slot-save-actions">
+                      <button
+                        aria-label={`Continue ${save.character.name} in Slot ${slot}`}
+                        className="save-continue-button"
+                        onClick={() => continueLocal(slot)}
+                        type="button"
+                      >
+                        Continue Offline
+                      </button>
+                      <button
+                        aria-label={`Create new character in Slot ${slot}`}
+                        className="save-secondary-button"
+                        onClick={() => openCharacterEditor(slot)}
+                        type="button"
+                      >
+                        New Character
+                      </button>
+                    </div>
+                  </>
+                ) : (
+                  <>
+                    <p className="save-empty-state">Empty slot</p>
+                    <button
+                      aria-label={`Create character in Slot ${slot}`}
+                      className="save-continue-button"
+                      onClick={() => openCharacterEditor(slot)}
+                      type="button"
+                    >
+                      Create Character
+                    </button>
+                  </>
+                )}
+              </article>
+            )
+          })}
+        </div>
+
+        <section className="online-save-panel">
+          <div className="save-option-heading online-save-heading">
+            <span aria-hidden="true">O</span>
+            <div>
+              <p className="eyebrow">Account</p>
+              <h2>Online Save</h2>
+            </div>
+          </div>
+
+          {account ? (
+            <>
+              <div className="online-save-summary">
+                <strong className="save-character-name">
+                  {onlineSave?.character.name ?? account.username}
+                </strong>
+                {onlineSave ? (
+                  <SaveMetadata save={onlineSave} />
+                ) : (
+                  <p className="save-empty-state">
+                    {onlineBusy ? 'Checking online save...' : 'No online IWT2 save found.'}
                   </p>
+                )}
               </div>
-
+              <label className="online-save-destination">
-        <div className="auth-card">
+                Copy Into
-          <div className="auth-tabs">
+                <select
-            <button
+                  disabled={onlineBusy || !onlineSave}
-              className={mode === 'login' ? 'selected' : ''}
+                  onChange={(event) => {
-              onClick={() => {
+                    setOnlineDestinationSlot(Number(event.target.value) as Iwt2LocalSaveSlot)
-                setMode('login')
+                    setConfirmOnlineDestination(null)
-                setMessage('')
                   }}
+                  value={onlineDestinationSlot}
+                >
+                  {IWT2_LOCAL_SAVE_SLOTS.map((slot) => (
+                    <option key={slot} value={slot}>
+                      Slot {slot} — {localSaves[slot]?.character.name ?? 'Empty'}
+                    </option>
+                  ))}
+                </select>
+              </label>
+              <div className="online-save-actions">
+                <button
+                  className={`save-continue-button ${confirmOnlineDestination === onlineDestinationSlot ? 'danger' : ''}`}
+                  disabled={onlineBusy || !onlineSave}
+                  onClick={continueOnline}
                   type="button"
                 >
-              Sign In
+                  {confirmOnlineDestination === onlineDestinationSlot
+                    ? `Confirm Replace Slot ${onlineDestinationSlot}`
+                    : `Load Into Slot ${onlineDestinationSlot}`}
                 </button>
                 <button
-              className={mode === 'register' ? 'selected' : ''}
+                  className="save-secondary-button"
-              onClick={() => {
+                  disabled={onlineBusy}
-                setMode('register')
+                  onClick={() => { void handleDifferentAccount() }}
-                setMessage('')
-              }}
                   type="button"
                 >
-              Create Account
+                  Switch Account
                 </button>
               </div>
-
+            </>
-          <form onSubmit={submit}>
+          ) : (
+            <form className="online-save-login" onSubmit={signIn}>
               <label>
                 Username
                 <input
@@ -106,23 +388,10 @@ export function AuthScreen({ onAuthenticated, serverMessage = '' }: Props) {
                   value={username}
                 />
               </label>
-            {mode === 'register' && (
-              <label>
-                Character Name
-                <input
-                  autoComplete="nickname"
-                  maxLength={20}
-                  minLength={2}
-                  onChange={(event) => setCharacterName(event.target.value)}
-                  required
-                  value={characterName}
-                />
-              </label>
-            )}
               <label>
                 Password
                 <input
-                autoComplete={mode === 'login' ? 'current-password' : 'new-password'}
+                  autoComplete="current-password"
                   maxLength={128}
                   minLength={10}
                   onChange={(event) => setPassword(event.target.value)}
@@ -131,62 +400,19 @@ export function AuthScreen({ onAuthenticated, serverMessage = '' }: Props) {
                   value={password}
                 />
               </label>
-            <button className="primary-button" disabled={busy} type="submit">
+              <button className="save-continue-button" disabled={onlineBusy} type="submit">
-              {busy
+                {onlineBusy ? 'Checking Account...' : 'Sign In & Check Save'}
-                ? 'Working...'
-                : mode === 'login'
-                  ? 'Enter Chronicle'
-                  : 'Begin Adventure'}
               </button>
             </form>
-
-          <p className={`auth-message ${message ? 'error' : ''}`}>
-            {message || serverMessage || (
-              mode === 'register'
-                ? 'The first account keeps the current local character and save.'
-                : 'Sign in to continue your character.'
           )}
-          </p>
-
-          <div className="offline-divider"><span>or</span></div>
-
-          <section className="offline-entry">
-            <div>
-              <p className="eyebrow">Local Save</p>
-              <h2>Play Offline</h2>
-              <p>
-                No account or connection required. Offline progress stays on
-                this device.
-              </p>
-            </div>
-            {offlineCharacterExists && (
-              <button
-                className="offline-resume-button"
-                onClick={resumeOffline}
-                type="button"
-              >
-                Continue Offline Character
-              </button>
-            )}
-            <label>
-              {offlineCharacterExists ? 'New Character Name' : 'Character Name'}
-              <input
-                maxLength={20}
-                minLength={2}
-                onChange={(event) => setOfflineName(event.target.value)}
-                placeholder="Mira"
-                value={offlineName}
-              />
-            </label>
-            <button
-              className="text-button offline-new-button"
-              onClick={beginOffline}
-              type="button"
-            >
-              {offlineCharacterExists ? 'Replace Offline Character' : 'Begin Offline Adventure'}
-            </button>
         </section>
-        </div>
+
+        <p
+          aria-live="polite"
+          className={`save-gateway-status ${messageIsError ? 'error' : ''}`}
+        >
+          {message}
+        </p>
       </section>
     </main>
   )

src/gameRepository.ts

@@ -1841,6 +1841,10 @@ export function selectOnlineMode() {
   writeMode('online')
 }
 
+export function selectOfflineMode() {
+  writeMode('offline-local')
+}
+
 export function createOfflineCharacter(characterName: string): AuthSession {
   const name = characterName.trim() || 'Mira'
   if (!/^[A-Za-z][A-Za-z0-9 '-]{1,19}$/.test(name)) {

src/input.tsx

@@ -435,6 +435,10 @@ function hasDedicatedGameNavigation() {
   ).some(isVisible)
 }
 
+function isDedicatedNavigationAction(action: InputAction) {
+  return action.startsWith('navigate') || action === 'confirm' || action === 'back'
+}
+
 function dispatchGameAction(action: InputAction, device: InputDevice) {
   window.dispatchEvent(new CustomEvent(GAME_ACTION_EVENT, {
     detail: { action, device },
@@ -621,7 +625,12 @@ export function InputProvider({ children }: { children: ReactNode }) {
     setLastDevice(device)
     document.documentElement.dataset.inputDevice = device
 
-    if (controllerUiInput && dedicatedNavAction && hasDedicatedGameNavigation()) {
+    if (
+      device === 'controller'
+      && dedicatedNavAction
+      && !keyboardInputRef.current
+      && hasDedicatedGameNavigation()
+    ) {
       if (document.activeElement instanceof HTMLElement) document.activeElement.blur()
       dispatchGameAction(action, device)
       return
@@ -709,6 +718,7 @@ export function InputProvider({ children }: { children: ReactNode }) {
       'navigateRight',
       'confirm',
       'back',
+      'pause',
     ] satisfies InputAction[]
     const directTargetActions = [
       'targetParty1',
@@ -738,7 +748,13 @@ export function InputProvider({ children }: { children: ReactNode }) {
       'navigateLeft',
       'navigateRight',
     ] satisfies InputAction[]
-    const action = DPAD_NAV_ACTIONS[token] && (!combatActive || uiOverlay)
+    const dedicatedNavigationActive = hasDedicatedGameNavigation() && (!combatActive || uiOverlay)
+    const action = dedicatedNavigationActive
+      ? uiPriority.find((candidate) => bindingsRef.current.controller[candidate] === token)
+        ?? (DPAD_NAV_ACTIONS[token] && isDedicatedNavigationAction(DPAD_NAV_ACTIONS[token])
+          ? DPAD_NAV_ACTIONS[token]
+          : undefined)
+      : DPAD_NAV_ACTIONS[token] && (!combatActive || uiOverlay)
       ? DPAD_NAV_ACTIONS[token]
       : uiOverlay
       ? uiPriority.find((candidate) => bindingsRef.current.controller[candidate] === token)
@@ -1027,7 +1043,11 @@ export function InputProvider({ children }: { children: ReactNode }) {
             <div className="controller-keyboard-heading">
               <div>
                 <p className="eyebrow">Controller Keyboard</p>
-                <strong>{keyboardInput.value || 'Enter text'}</strong>
+                <strong>
+                  {keyboardInput.type === 'password'
+                    ? '•'.repeat(keyboardInput.value.length) || 'Enter password'
+                    : keyboardInput.value || 'Enter text'}
+                </strong>
               </div>
               <button onClick={closeKeyboard} type="button">Done</button>
             </div>

src/modes/iwt2/IWantToHeal2App.tsx

@@ -22,11 +22,7 @@ import {
   Iwt2RoguelikeUpgradeScreen,
   Iwt2SettingsScreen,
 } from './screens/Iwt2ShellScreens'
-import {
+import { writeIwt2Save, type Iwt2LocalSaveSlot, type Iwt2Save } from './save/iwt2Repository'
-  loadIwt2Save,
-  writeIwt2Save,
-  type Iwt2Save,
-} from './save/iwt2Repository'
 import { IWT2_BOSS_METADATA, type Iwt2BossId } from './content/bosses'
 import { iwt2BossCoinRewardFor } from './content/bossRewards'
 import {
@@ -46,6 +42,18 @@ import {
   type Iwt2RoguelikeSelfBuffId,
   type Iwt2RoguelikeVariant,
 } from './content/roguelike'
+import {
+  createIwt2WeightedRoguelikeBossPair,
+  createUniformIwt2RoguelikeBossPair,
+  enabledIwt2RoguelikeBossPool,
+  IWT2_PVP_ROGUELIKE_BOSS_ROSTER_LIMIT_ENABLED,
+  IWT2_PVP_ROGUELIKE_ENABLED_BOSS_IDS,
+  IWT2_PVP_STADIUM_BOSS_ROSTER_LIMIT_ENABLED,
+  IWT2_PVP_STADIUM_ENABLED_BOSS_IDS,
+  IWT2_PVE_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED,
+  IWT2_PVP_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED,
+  IWT2_PVP_STADIUM_WEIGHTED_BOSS_PROGRESSION_ENABLED,
+} from './content/roguelikeBossProgression'
 
 type Iwt2Screen =
   | 'menu'
@@ -64,9 +72,11 @@ type Iwt2Screen =
 const IWT2_MENU_COLUMNS = 2
 const IWT2_ROGUELIKE_CHOICE_COUNT = 3
 const IWT2_PVP_FIRST_BUFF_EXTRA_TARGET_CHANCE = 0.65
+const IWT2_ROGUELIKE_GREEN_COIN_BOSS_THRESHOLD = 5
 
 type Iwt2RoguelikeRunState = {
   bossIds: Iwt2BossId[]
+  bossesDefeated: number
   buffs: Iwt2RoguelikeSelfBuffId[]
   contentType: Iwt2RoguelikeContentType
   debuffs: Iwt2RoguelikeOpponentDebuffId[]
@@ -126,8 +136,8 @@ const MENU_ITEMS: Array<{
   },
   {
     screen: 'cloud-save',
-    title: 'Backup Slot',
+    title: 'Cloud Backup',
-    description: 'Choose local, online, or fresh IWT2 progress.',
+    description: 'Compare the active local slot with your online backup.',
     glyph: 'C',
   },
   {
@@ -139,15 +149,19 @@ const MENU_ITEMS: Array<{
 ]
 
 export function IWantToHeal2App({
+  initialSave,
+  localSlot,
   onlineBackupsAvailable,
-  onBackToGameSelect,
+  onExitToSaveSelect,
 }: {
+  initialSave: Iwt2Save
+  localSlot: Iwt2LocalSaveSlot
   onlineBackupsAvailable: boolean
-  onBackToGameSelect: () => void
+  onExitToSaveSelect: () => void
 }) {
   const { enabled: dualScreenEnabled } = useDualScreen()
   const [screen, setScreen] = useState<Iwt2Screen>('menu')
-  const [save, setSave] = useState<Iwt2Save>(loadIwt2Save)
+  const [save, setSave] = useState<Iwt2Save>(initialSave)
   const [selectedIndex, setSelectedIndex] = useState(0)
   const [selectedBossId, setSelectedBossId] = useState<Iwt2BossId>('bulldrome')
   const [arenaModeLabel, setArenaModeLabel] = useState('Dungeon')
@@ -162,8 +176,8 @@ export function IWantToHeal2App({
   const cancelPvpQueueRef = useRef<(() => void) | null>(null)
 
   useEffect(() => {
-    writeIwt2Save(save)
+    writeIwt2Save(save, localSlot)
-  }, [save])
+  }, [localSlot, save])
 
   useEffect(() => () => {
     cancelPvpQueueRef.current?.()
@@ -191,7 +205,7 @@ export function IWantToHeal2App({
   useGameAction((action, device) => {
     if (screen !== 'menu' || device !== 'controller') return
     if (action === 'back') {
-      onBackToGameSelect()
+      onExitToSaveSelect()
       return
     }
     if (action === 'confirm') {
@@ -244,10 +258,13 @@ export function IWantToHeal2App({
           buffs: roguelikeRun.buffs,
           contentType: roguelikeRun.contentType,
           debuffs: roguelikeRun.debuffs,
+          greenCoinThreshold: IWT2_ROGUELIKE_GREEN_COIN_BOSS_THRESHOLD,
+          bossesDefeated: roguelikeRun.bossesDefeated,
           onVictory: () => {
             setRoguelikeRun((current) => current
               ? {
                   ...current,
+                  bossesDefeated: current.bossesDefeated + current.bossIds.length,
                   ...buildRoguelikeChoices(save, current.variant),
                 }
               : current)
@@ -271,7 +288,7 @@ export function IWantToHeal2App({
   if (screen === 'roguelike-upgrade' && roguelikeRun) {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2RoguelikeUpgradeScreen
           activeBuffSummary={summarizeIwt2Buffs(save, roguelikeRun.buffs)}
           activeDebuffSummary={summarizeIwt2Debuffs(save, roguelikeRun.debuffs)}
@@ -295,7 +312,7 @@ export function IWantToHeal2App({
   if (screen === 'dungeons') {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2DungeonsScreen
           difficultySlug={selectedDungeonDifficultySlug}
           save={save}
@@ -316,7 +333,7 @@ export function IWantToHeal2App({
   if (screen === 'roguelike') {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2RoguelikeScreen
           contentType={roguelikeContentType}
           variant={roguelikeVariant}
@@ -346,7 +363,7 @@ export function IWantToHeal2App({
   if (screen === 'raids') {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2ModeScreen
           difficultySlug={selectedRaidDifficultySlug}
           mode="Raids"
@@ -380,7 +397,7 @@ export function IWantToHeal2App({
           save={save}
           title="Gear Upgrade"
           onBack={() => setScreen('menu')}
-          onBackToGameSelect={onBackToGameSelect}
+          onExitToSaveSelect={onExitToSaveSelect}
         />
         <Iwt2GearUpgradeScreen
           save={save}
@@ -394,7 +411,7 @@ export function IWantToHeal2App({
   if (screen === 'customize-character') {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2CustomizeCharacterScreen
           save={save}
           onBack={() => setScreen('menu')}
@@ -407,7 +424,7 @@ export function IWantToHeal2App({
   if (screen === 'cloud-save') {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2CloudSaveScreen
           save={save}
           onlineBackupsAvailable={onlineBackupsAvailable}
@@ -421,7 +438,7 @@ export function IWantToHeal2App({
   if (screen === 'settings') {
     return (
       <main className="game-shell iwt2-shell">
-        <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+        <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
         <Iwt2SettingsScreen onBack={() => setScreen('menu')} />
       </main>
     )
@@ -429,7 +446,7 @@ export function IWantToHeal2App({
 
   return (
     <main className="game-shell iwt2-shell">
-      <Iwt2Header save={save} onBackToGameSelect={onBackToGameSelect} />
+      <Iwt2Header save={save} onExitToSaveSelect={onExitToSaveSelect} />
 
       {screen === 'menu' && (
         <section className="iwt2-menu-screen" data-game-nav-active="true">
@@ -522,7 +539,8 @@ function createRoguelikeRun(
   contentType: Iwt2RoguelikeContentType,
 ): Iwt2RoguelikeRunState {
   return {
-    bossIds: createRandomRoguelikeBossPair(),
+    bossIds: createRoguelikeBossPair(variant, contentType, 1, 0),
+    bossesDefeated: 0,
     buffs: [],
     contentType,
     debuffs: [],
@@ -590,15 +608,45 @@ function applyRoguelikeChoice(
   return {
     ...run,
     ...nextBase,
-    bossIds: createRandomRoguelikeBossPair(),
+    bossIds: createRoguelikeBossPair(run.variant, run.contentType, run.stage + 1, run.bossesDefeated),
     ...buildRoguelikeChoices(save, run.variant),
     stage: run.stage + 1,
   }
 }
 
-function createRandomRoguelikeBossPair(): Iwt2BossId[] {
+function createRoguelikeBossPair(
-  const pool = Object.keys(IWT2_BOSS_METADATA) as Iwt2BossId[]
+  variant: Iwt2RoguelikeVariant,
-  return chooseRunChoices(pool, 2)
+  contentType: Iwt2RoguelikeContentType,
+  stage: number,
+  bossesDefeated: number,
+): Iwt2BossId[] {
+  const weightedProgressionEnabled = variant === 'pve'
+    ? IWT2_PVE_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED
+    : contentType === 'stadium'
+      ? IWT2_PVP_STADIUM_WEIGHTED_BOSS_PROGRESSION_ENABLED
+      : IWT2_PVP_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED
+  const bossPool = roguelikeBossPoolFor(variant, contentType)
+  const count = bossesDefeated >= IWT2_ROGUELIKE_GREEN_COIN_BOSS_THRESHOLD ? 3 : 2
+
+  if (weightedProgressionEnabled) {
+    return createIwt2WeightedRoguelikeBossPair(stage, Math.random, { bossPool, count })
+  }
+  return createUniformIwt2RoguelikeBossPair(Math.random, { bossPool, count })
+}
+
+function roguelikeBossPoolFor(
+  variant: Iwt2RoguelikeVariant,
+  contentType: Iwt2RoguelikeContentType,
+): Iwt2BossId[] | undefined {
+  if (variant !== 'pvp') return undefined
+  if (contentType === 'stadium') {
+    return IWT2_PVP_STADIUM_BOSS_ROSTER_LIMIT_ENABLED
+      ? enabledIwt2RoguelikeBossPool(IWT2_PVP_STADIUM_ENABLED_BOSS_IDS)
+      : undefined
+  }
+  return IWT2_PVP_ROGUELIKE_BOSS_ROSTER_LIMIT_ENABLED
+    ? enabledIwt2RoguelikeBossPool(IWT2_PVP_ROGUELIKE_ENABLED_BOSS_IDS)
+    : undefined
 }
 
 function chooseRunChoices<T>(items: readonly T[], count: number): T[] {
@@ -644,19 +692,19 @@ function isExtraTargetBuff(choice: Iwt2RoguelikeChoice<Iwt2RoguelikeSelfBuffId>)
 
 function Iwt2Header({
   onBack,
-  onBackToGameSelect,
+  onExitToSaveSelect,
   save,
   title,
 }: {
   onBack?: () => void
-  onBackToGameSelect: () => void
+  onExitToSaveSelect: () => void
   save: Iwt2Save
   title?: string
 }) {
   return (
     <header className="topbar app-header">
-      <button className="brand-button" onClick={onBackToGameSelect} type="button">
+      <button className="brand-button" onClick={onExitToSaveSelect} type="button">
-        <strong>Games</strong>
+        <strong>Saves</strong>
       </button>
       {title && <strong className="iwt2-header-title">{title}</strong>}
       <div className="character-summary">

src/modes/iwt2/components/ArenaBars.tsx

@@ -1,11 +1,13 @@
 export function ArenaBar({
   className = '',
   current,
+  label,
   max,
   shield = 0,
 }: {
   className?: string
   current: number
+  label?: string
   max: number
   shield?: number
 }) {
@@ -15,6 +17,7 @@ export function ArenaBar({
     <div className={`iwt2-bar ${className}`}>
       <span style={{ width: `${percent}%` }} />
       {shieldPercent > 0 && <i style={{ width: `${shieldPercent}%` }} />}
+      {label && <em>{label}</em>}
     </div>
   )
 }

src/modes/iwt2/components/PartyFrames.tsx

@@ -46,9 +46,8 @@ export function PartyFrames({
             <div>
               <div className="iwt2-party-row-title">
                 <strong>{meta.name}</strong>
-                <small>{Math.ceil(member.health)}</small>
               </div>
-              <ArenaBar className="hp" current={member.health} max={member.maxHealth} shield={member.shield} />
+              <ArenaBar className="hp" current={member.health} label={`${Math.ceil(member.maxHealth)}`} max={member.maxHealth} shield={member.shield} />
               {member.maxMana > 0 && (
                 <ArenaBar className="mana" current={member.mana} max={member.maxMana} />
               )}

src/modes/iwt2/content/bosses.ts

@@ -220,11 +220,11 @@ const DEFAULT_YIAN_KUT_KU_BOSS_METADATA: Iwt2BossMetadata = {
   firePuddleRadius: 42,
   firePuddleDamage: 15,
   firePuddleSeconds: 8,
-  birdWaveThresholds: [0.9, 0.4],
+  birdWaveThresholds: [0.5],
   birdFlightCooldown: 10,
   birdFlightWindup: 0.85,
   birdFlightSpeed: 360,
-  birdHealth: 100,
+  birdHealth: 55,
   birdRadius: 16,
   birdContactDamage: 26,
   birdStunSeconds: 0.75,

src/modes/iwt2/content/gear.ts

@@ -2,11 +2,13 @@ import type { Iwt2BossId } from './bosses'
 import type { Iwt2PlayerClassId } from './classes'
 import { iwt2BossCoinRewardFor } from './bossRewards'
 import { IWT2_INFUSION_ABILITIES, type Iwt2InfusionAbilityId } from './infusionAbilities'
+import type { Iwt2RoguelikeSelfBuffId } from './roguelike'
 export { IWT2_INFUSION_ABILITIES, iwt2InfusionAbilitiesForClass } from './infusionAbilities'
 export type { Iwt2InfusionAbility, Iwt2InfusionAbilityId } from './infusionAbilities'
 
 export type Iwt2GearSlotId = 'weapon' | 'helmet' | 'chest' | 'legs' | 'feet'
-export type Iwt2GearLevel = 0 | 1 | 2 | 3 | 4 | 5
+export type Iwt2GearLevel = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
+export type Iwt2PassiveInfusionId = Exclude<Iwt2RoguelikeSelfBuffId, 'revive-party-members'>
 export type Iwt2GearStatId =
   | 'maxHealth'
   | 'moveSpeed'
@@ -24,6 +26,7 @@ export type Iwt2GearSlotProgress = {
 export type Iwt2ClassGearProgress = {
   slots: Record<Iwt2GearSlotId, Iwt2GearSlotProgress>
   infusionAbilityId: Iwt2InfusionAbilityId | null
+  passiveInfusionId: Iwt2PassiveInfusionId | null
 }
 
 export type Iwt2GearProgress = Record<Iwt2PlayerClassId, Iwt2ClassGearProgress>
@@ -43,6 +46,9 @@ export type Iwt2GearSlotRecipe = {
 }
 
 export const IWT2_GEAR_SLOTS: Iwt2GearSlotId[] = ['weapon', 'helmet', 'chest', 'legs', 'feet']
+export const IWT2_MAX_GEAR_LEVEL: Iwt2GearLevel = 10
+export const IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL: Iwt2GearLevel = 5
+export const IWT2_PASSIVE_INFUSION_MIN_GEAR_LEVEL: Iwt2GearLevel = 10
 
 export const IWT2_GEAR_SLOT_LABELS: Record<Iwt2GearSlotId, string> = {
   weapon: 'Weapon',
@@ -120,7 +126,13 @@ export function createDefaultIwt2GearProgress(): Iwt2GearProgress {
 }
 
 export function isIwt2InfusionUnlocked(progress: Iwt2ClassGearProgress): boolean {
-  return Object.values(progress.slots).some((slot) => slot.level >= 5)
+  return Object.values(progress.slots).some((slot) => slot.level >= IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL)
+}
+
+export function isIwt2PassiveInfusionUnlocked(progress: Iwt2GearProgress): boolean {
+  return Object.values(progress).some((classProgress) => (
+    Object.values(classProgress.slots).some((slot) => slot.level >= IWT2_PASSIVE_INFUSION_MIN_GEAR_LEVEL)
+  ))
 }
 
 export function iwt2GearUpgradeCosts(
@@ -128,7 +140,7 @@ export function iwt2GearUpgradeCosts(
   slotId: Iwt2GearSlotId,
   currentLevel: Iwt2GearLevel,
 ): Iwt2GearUpgradeCost[] {
-  if (currentLevel >= 5) return []
+  if (currentLevel >= IWT2_MAX_GEAR_LEVEL) return []
   const recipe = IWT2_GEAR_SLOT_RECIPES[classId][slotId]
   const nextLevel = (currentLevel + 1) as Exclude<Iwt2GearLevel, 0>
   const slug = upgradeDifficultySlug(nextLevel)
@@ -147,10 +159,15 @@ export function iwt2GearUpgradeCosts(
     { itemId: primary.id, itemName: primary.name, quantity: 4 },
     { itemId: secondary.id, itemName: secondary.name, quantity: 3 },
   ]
-  return [
+  if (nextLevel === 5) return [
     { itemId: primary.id, itemName: primary.name, quantity: 5 },
     { itemId: secondary.id, itemName: secondary.name, quantity: 4 },
   ]
+  const overcap = nextLevel - 5
+  return [
+    { itemId: primary.id, itemName: primary.name, quantity: 5 + overcap },
+    { itemId: secondary.id, itemName: secondary.name, quantity: 4 + overcap },
+  ]
 }
 
 export function iwt2InfusionCosts(
@@ -178,6 +195,7 @@ function createDefaultClassGearProgress(): Iwt2ClassGearProgress {
       feet: { level: 0 },
     },
     infusionAbilityId: null,
+    passiveInfusionId: null,
   }
 }
 
@@ -193,6 +211,7 @@ function slotRecipe(
 
 function upgradeDifficultySlug(level: Exclude<Iwt2GearLevel, 0>): string {
   if (level <= 2) return 'initiate'
+  if (level >= 6) return 'veteran'
   if (level === 3) return 'veteran'
   if (level === 4) return 'champion'
   return 'mythic'

src/modes/iwt2/content/pvpGearNormalization.ts

@@ -0,0 +1,37 @@
+import { IWT2_PARTY_ORDER } from './classes'
+import {
+  IWT2_GEAR_SLOTS,
+  type Iwt2GearLevel,
+  type Iwt2GearProgress,
+} from './gear'
+
+export type Iwt2PvpGearNormalizationConfig = {
+  enabled: boolean
+  gearLevel: Iwt2GearLevel
+}
+
+export const IWT2_PVP_NORMALIZED_GEAR_LEVEL: Iwt2GearLevel = 5
+
+export const IWT2_PVP_GEAR_NORMALIZATION: Iwt2PvpGearNormalizationConfig = {
+  enabled: true,
+  gearLevel: IWT2_PVP_NORMALIZED_GEAR_LEVEL,
+}
+
+export function createIwt2PvpNormalizedGearProgress(
+  config = IWT2_PVP_GEAR_NORMALIZATION,
+): Iwt2GearProgress | undefined {
+  if (!config.enabled) return undefined
+
+  return Object.fromEntries(
+    IWT2_PARTY_ORDER.map((classId) => [
+      classId,
+      {
+        slots: Object.fromEntries(
+          IWT2_GEAR_SLOTS.map((slotId) => [slotId, { level: config.gearLevel }]),
+        ),
+        infusionAbilityId: null,
+        passiveInfusionId: null,
+      },
+    ]),
+  ) as Iwt2GearProgress
+}

src/modes/iwt2/content/roguelikeBossProgression.ts

@@ -0,0 +1,216 @@
+import { IWT2_BOSS_METADATA, type Iwt2BossId } from './bosses'
+
+export const IWT2_PVE_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED = true
+export const IWT2_PVP_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED = true
+export const IWT2_PVP_STADIUM_WEIGHTED_BOSS_PROGRESSION_ENABLED = true
+export const IWT2_PVP_ROGUELIKE_BOSS_ROSTER_LIMIT_ENABLED = true
+export const IWT2_PVP_STADIUM_BOSS_ROSTER_LIMIT_ENABLED = true
+
+export const IWT2_PVP_ROGUELIKE_ENABLED_BOSS_IDS: readonly Iwt2BossId[] = Object.keys(IWT2_BOSS_METADATA) as Iwt2BossId[]
+
+export const IWT2_PVP_STADIUM_ENABLED_BOSS_IDS: readonly Iwt2BossId[] = IWT2_PVP_ROGUELIKE_ENABLED_BOSS_IDS
+
+type Iwt2RoguelikeBossTier = 'early' | 'mid' | 'late'
+
+type TierWeight = {
+  tier: Iwt2RoguelikeBossTier
+  weight: number
+}
+
+type Iwt2RoguelikeBossPoolOptions = {
+  bossPool?: readonly Iwt2BossId[]
+  count?: number
+}
+
+const IWT2_ROGUELIKE_BOSS_TIERS: Record<Iwt2RoguelikeBossTier, readonly Iwt2BossId[]> = {
+  early: ['bulldrome', 'yian-kut-ku', 'great-jaggi', 'rathian', 'stormcoil-wyrm'],
+  mid: ['khezu', 'barroth', 'tobi-kadachi', 'ember-mantis-duelist', 'crystal-bat-matriarch', 'hollowcrown-revenant'],
+  late: ['rimebastion', 'cinderback-ricochet', 'obsidian-ram-golem', 'venom-orchid-hydra', 'sandglass-scorpion'],
+}
+
+const IWT2_ROGUELIKE_BOSS_THREAT: Record<Iwt2RoguelikeBossTier, number> = {
+  early: 1,
+  mid: 2,
+  late: 3,
+}
+
+const IWT2_ROGUELIKE_BOSS_TIER_BY_ID: Record<Iwt2BossId, Iwt2RoguelikeBossTier> = {
+  bulldrome: 'early',
+  'yian-kut-ku': 'early',
+  'great-jaggi': 'early',
+  rathian: 'early',
+  'stormcoil-wyrm': 'early',
+  khezu: 'mid',
+  barroth: 'mid',
+  'tobi-kadachi': 'mid',
+  'ember-mantis-duelist': 'mid',
+  'crystal-bat-matriarch': 'mid',
+  'hollowcrown-revenant': 'mid',
+  rimebastion: 'late',
+  'cinderback-ricochet': 'late',
+  'obsidian-ram-golem': 'late',
+  'venom-orchid-hydra': 'late',
+  'sandglass-scorpion': 'late',
+}
+
+export function createIwt2PveRoguelikeBossPair(
+  stage: number,
+  random: () => number = Math.random,
+): Iwt2BossId[] {
+  return createIwt2WeightedRoguelikeBossPair(stage, random)
+}
+
+export function createIwt2WeightedRoguelikeBossPair(
+  stage: number,
+  random: () => number = Math.random,
+  options: Iwt2RoguelikeBossPoolOptions = {},
+): Iwt2BossId[] {
+  const choices: Iwt2BossId[] = []
+  const maxThreat = maxThreatForStage(stage)
+  const bossPool = normalizeBossPool(options.bossPool)
+  const count = normalizeBossCount(options.count)
+
+  while (choices.length < count) {
+    const next = chooseWeightedBossForStage(stage, choices, maxThreat, random, bossPool)
+    if (!next) break
+    choices.push(next)
+  }
+
+  return choices.length === count
+    ? choices
+    : createUniformIwt2RoguelikeBossPair(random, { bossPool, count })
+}
+
+export function createUniformIwt2RoguelikeBossPair(
+  random: () => number = Math.random,
+  options: Iwt2RoguelikeBossPoolOptions = {},
+): Iwt2BossId[] {
+  const pool = normalizeBossPool(options.bossPool)
+  const count = normalizeBossCount(options.count)
+  const choices: Iwt2BossId[] = []
+  while (pool.length > 0 && choices.length < count) {
+    const index = randomIndex(pool.length, random)
+    const [choice] = pool.splice(index, 1)
+    if (choice) choices.push(choice)
+  }
+  return choices
+}
+
+export function enabledIwt2RoguelikeBossPool(
+  bossIds: readonly Iwt2BossId[],
+): Iwt2BossId[] {
+  return normalizeBossPool(bossIds)
+}
+
+function chooseWeightedBossForStage(
+  stage: number,
+  selected: readonly Iwt2BossId[],
+  maxThreat: number,
+  random: () => number,
+  bossPool: readonly Iwt2BossId[],
+): Iwt2BossId | undefined {
+  const selectedSet = new Set(selected)
+  const bossPoolSet = new Set(bossPool)
+  const selectedThreat = selected.reduce((total, bossId) => total + threatForBoss(bossId), 0)
+  const weightedTiers = tierWeightsForStage(stage)
+    .map((entry) => ({
+      ...entry,
+      bosses: IWT2_ROGUELIKE_BOSS_TIERS[entry.tier].filter((bossId) => (
+        bossPoolSet.has(bossId)
+        && !selectedSet.has(bossId)
+        && selectedThreat + threatForBoss(bossId) <= maxThreat
+      )),
+    }))
+    .filter((entry) => entry.weight > 0 && entry.bosses.length > 0)
+
+  const totalWeight = weightedTiers.reduce((total, entry) => total + entry.weight, 0)
+  if (totalWeight <= 0) return undefined
+
+  let roll = safeRandom(random) * totalWeight
+  for (const entry of weightedTiers) {
+    roll -= entry.weight
+    if (roll <= 0) {
+      return entry.bosses[randomIndex(entry.bosses.length, random)]
+    }
+  }
+
+  const lastEntry = weightedTiers[weightedTiers.length - 1]
+  return lastEntry?.bosses[randomIndex(lastEntry.bosses.length, random)]
+}
+
+function normalizeBossPool(bossPool: readonly Iwt2BossId[] | undefined): Iwt2BossId[] {
+  const knownBosses = Object.keys(IWT2_BOSS_METADATA) as Iwt2BossId[]
+  if (!bossPool) return knownBosses
+
+  const knownBossSet = new Set(knownBosses)
+  const normalized: Iwt2BossId[] = []
+  for (const bossId of bossPool) {
+    if (knownBossSet.has(bossId) && !normalized.includes(bossId)) {
+      normalized.push(bossId)
+    }
+  }
+
+  return normalized.length > 0 ? normalized : knownBosses
+}
+
+function tierWeightsForStage(stage: number): TierWeight[] {
+  const safeStage = Math.max(1, Math.floor(stage))
+  if (safeStage <= 2) {
+    return [
+      { tier: 'early', weight: 85 },
+      { tier: 'mid', weight: 15 },
+      { tier: 'late', weight: 0 },
+    ]
+  }
+  if (safeStage === 3) {
+    return [
+      { tier: 'early', weight: 60 },
+      { tier: 'mid', weight: 35 },
+      { tier: 'late', weight: 5 },
+    ]
+  }
+  if (safeStage <= 5) {
+    return [
+      { tier: 'early', weight: 25 },
+      { tier: 'mid', weight: 60 },
+      { tier: 'late', weight: 15 },
+    ]
+  }
+  if (safeStage === 6) {
+    return [
+      { tier: 'early', weight: 10 },
+      { tier: 'mid', weight: 50 },
+      { tier: 'late', weight: 40 },
+    ]
+  }
+  return [
+    { tier: 'early', weight: 5 },
+    { tier: 'mid', weight: 30 },
+    { tier: 'late', weight: 65 },
+  ]
+}
+
+function maxThreatForStage(stage: number): number {
+  const safeStage = Math.max(1, Math.floor(stage))
+  if (safeStage <= 2) return 3
+  if (safeStage === 3) return 4
+  if (safeStage <= 5) return 5
+  return 8
+}
+
+function threatForBoss(bossId: Iwt2BossId): number {
+  return IWT2_ROGUELIKE_BOSS_THREAT[IWT2_ROGUELIKE_BOSS_TIER_BY_ID[bossId]]
+}
+
+function randomIndex(length: number, random: () => number): number {
+  return Math.min(length - 1, Math.floor(safeRandom(random) * length))
+}
+
+function normalizeBossCount(count: number | undefined): number {
+  return Math.max(1, Math.min(3, Math.floor(count ?? 2)))
+}
+
+function safeRandom(random: () => number): number {
+  const value = random()
+  return Number.isFinite(value) ? Math.min(0.999999999, Math.max(0, value)) : 0
+}

src/modes/iwt2/render/PhaserArena.tsx

@@ -4,15 +4,24 @@ import type { MovementVector } from '../../../input'
 import { BulldromeArenaScene } from './scenes/BulldromeArenaScene'
 import type { Iwt2ArenaState } from '../sim/arenaState'
 
+const IWT2_ARENA_FPS = 60
+
 type PhaserArenaProps = {
+  active: boolean
   movementRef: MutableRefObject<MovementVector>
   selectedPartyIdRef: MutableRefObject<string>
   stateRef: MutableRefObject<Iwt2ArenaState>
   onStep: (movement: MovementVector, dtSeconds: number) => Iwt2ArenaState
 }
 
-export function PhaserArena({ movementRef, onStep, selectedPartyIdRef, stateRef }: PhaserArenaProps) {
+export function PhaserArena({ active, movementRef, onStep, selectedPartyIdRef, stateRef }: PhaserArenaProps) {
+  const gameRef = useRef<Phaser.Game | null>(null)
   const hostRef = useRef<HTMLDivElement | null>(null)
+  const onStepRef = useRef(onStep)
+
+  useEffect(() => {
+    onStepRef.current = onStep
+  }, [onStep])
 
   useEffect(() => {
     if (!hostRef.current) return undefined
@@ -21,7 +30,7 @@ export function PhaserArena({ movementRef, onStep, selectedPartyIdRef, stateRef
       getMovement: () => movementRef.current,
       getSelectedPartyId: () => selectedPartyIdRef.current,
       getState: () => stateRef.current,
-      step: onStep,
+      step: (movement, dtSeconds) => onStepRef.current(movement, dtSeconds),
     })
     const game = new Phaser.Game({
       type: Phaser.AUTO,
@@ -30,17 +39,36 @@ export function PhaserArena({ movementRef, onStep, selectedPartyIdRef, stateRef
       height: initialState.bounds.height,
       backgroundColor: '#10141b',
       pixelArt: false,
+      fps: {
+        target: IWT2_ARENA_FPS,
+        limit: IWT2_ARENA_FPS,
+      },
       scale: {
         mode: Phaser.Scale.FIT,
         autoCenter: Phaser.Scale.CENTER_BOTH,
       },
       scene,
     })
+    gameRef.current = game
 
     return () => {
+      if (gameRef.current === game) gameRef.current = null
       game.destroy(true)
     }
-  }, [movementRef, onStep, selectedPartyIdRef, stateRef])
+  }, [movementRef, selectedPartyIdRef, stateRef])
+
+  useEffect(() => {
+    const game = gameRef.current
+    if (!game?.loop.started) return
+    if (active) {
+      if (!game.loop.running) {
+        game.loop.resetDelta()
+        game.loop.wake()
+      }
+      return
+    }
+    game.loop.sleep()
+  }, [active])
 
   return <div className="iwt2-phaser-host" ref={hostRef} />
 }

src/modes/iwt2/render/bossAnimation.ts

@@ -52,20 +52,17 @@ const BOSS_PROFILES: Partial<Record<Iwt2BossEntityState['bossId'], BossMotionPro
 const WARM_TINT = 0xffc88a
 const IMPACT_TINT = 0xff9b5f
 
-export function bossRenderMotion(entity: Iwt2BossEntityState, timeSeconds: number): BossRenderMotion {
+export function bossRenderMotion(
+  entity: Iwt2BossEntityState,
+  timeSeconds: number,
+  motion: BossRenderMotion = createBossRenderMotion(),
+): BossRenderMotion {
   const profile = BOSS_PROFILES[entity.bossId] ?? DEFAULT_PROFILE
   const phase = String(entity.attackPhase)
   const speed = Math.hypot(entity.velocity.x, entity.velocity.y)
   const moving = speed > 8 || phase === 'relocating'
   const facingX = entity.facing.x < -0.05 ? -1 : 1
-
+  resetBossRenderMotion(motion)
-  const motion: BossRenderMotion = {
-    x: 0,
-    y: 0,
-    scaleX: 1,
-    scaleY: 1,
-    rotation: 0,
-  }
 
   if (isActionPhase(phase, 'windup')) return windupMotion(motion, entity, phase, timeSeconds, facingX)
   if (isBurstPhase(phase)) return burstMotion(motion, timeSeconds, facingX)
@@ -76,12 +73,10 @@ export function bossRenderMotion(entity: Iwt2BossEntityState, timeSeconds: numbe
 
 function idleMotion(motion: BossRenderMotion, profile: BossMotionProfile, timeSeconds: number): BossRenderMotion {
   const wave = Math.sin(timeSeconds * profile.idleFrequency * Math.PI * 2)
-  return {
+  motion.y = -Math.max(0, wave) * profile.idleBob
-    ...motion,
+  motion.scaleY = 1 + Math.max(0, wave) * 0.025
-    y: -Math.max(0, wave) * profile.idleBob,
+  motion.scaleX = 1 - Math.max(0, wave) * 0.01
-    scaleY: 1 + Math.max(0, wave) * 0.025,
+  return motion
-    scaleX: 1 - Math.max(0, wave) * 0.01,
-  }
 }
 
 function movingMotion(
@@ -94,13 +89,11 @@ function movingMotion(
   const speedFactor = Math.min(1, Math.hypot(entity.velocity.x, entity.velocity.y) / 180)
   const stride = Math.sin(timeSeconds * profile.moveFrequency * Math.PI * 2)
   const lift = Math.abs(stride) * profile.moveBob
-  return {
+  motion.y = -lift
-    ...motion,
+  motion.scaleX = 1 + 0.012 * speedFactor
-    y: -lift,
+  motion.scaleY = 1 - 0.009 * Math.abs(stride)
-    scaleX: 1 + 0.012 * speedFactor,
+  motion.rotation = facingX * 0.025 * speedFactor
-    scaleY: 1 - 0.009 * Math.abs(stride),
+  return motion
-    rotation: facingX * 0.025 * speedFactor,
-  }
 }
 
 function windupMotion(
@@ -112,28 +105,24 @@ function windupMotion(
 ): BossRenderMotion {
   const pulse = 0.5 + Math.sin(timeSeconds * Math.PI * 9) * 0.5
   const isSlam = phase.includes('slam') || phase.includes('quake') || phase.includes('shatter')
-  return {
+  motion.x = -facingX * (isSlam ? 1.5 : 3)
-    ...motion,
+  motion.y = isSlam ? -2 : 2
-    x: -facingX * (isSlam ? 1.5 : 3),
+  motion.scaleX = 1.035
-    y: isSlam ? -2 : 2,
+  motion.scaleY = 0.965
-    scaleX: 1.035,
+  motion.rotation = -facingX * 0.02
-    scaleY: 0.965,
+  motion.tint = pulse > 0.45 || entity.phaseSecondsRemaining < 0.18 ? WARM_TINT : undefined
-    rotation: -facingX * 0.02,
+  return motion
-    tint: pulse > 0.45 || entity.phaseSecondsRemaining < 0.18 ? WARM_TINT : undefined,
-  }
 }
 
 function burstMotion(motion: BossRenderMotion, timeSeconds: number, facingX: number): BossRenderMotion {
   const shake = Math.sin(timeSeconds * Math.PI * 38) * 1.8
-  return {
+  motion.x = facingX * 3 + shake
-    ...motion,
+  motion.y = Math.cos(timeSeconds * Math.PI * 42) * 1.2
-    x: facingX * 3 + shake,
+  motion.scaleX = 1.045
-    y: Math.cos(timeSeconds * Math.PI * 42) * 1.2,
+  motion.scaleY = 0.96
-    scaleX: 1.045,
+  motion.rotation = facingX * 0.018
-    scaleY: 0.96,
+  motion.tint = WARM_TINT
-    rotation: facingX * 0.018,
+  return motion
-    tint: WARM_TINT,
-  }
 }
 
 function recoverMotion(
@@ -145,13 +134,24 @@ function recoverMotion(
   const settle = Math.max(0, Math.min(1, entity.phaseSecondsRemaining / 0.45))
   const impactPulse = Math.abs(Math.sin(timeSeconds * Math.PI * 11)) * settle
   const pop = profile.impactScale * impactPulse
-  return {
+  motion.y = -2 * impactPulse
-    ...motion,
+  motion.scaleX = 1 + pop
-    y: -2 * impactPulse,
+  motion.scaleY = 1 + pop * 0.45
-    scaleX: 1 + pop,
+  motion.tint = impactPulse > 0.45 ? IMPACT_TINT : undefined
-    scaleY: 1 + pop * 0.45,
+  return motion
-    tint: impactPulse > 0.45 ? IMPACT_TINT : undefined,
+}
-  }
+
+function createBossRenderMotion(): BossRenderMotion {
+  return { x: 0, y: 0, scaleX: 1, scaleY: 1, rotation: 0 }
+}
+
+function resetBossRenderMotion(motion: BossRenderMotion) {
+  motion.x = 0
+  motion.y = 0
+  motion.scaleX = 1
+  motion.scaleY = 1
+  motion.rotation = 0
+  motion.tint = undefined
 }
 
 function isActionPhase(phase: string, suffix: string): boolean {

src/modes/iwt2/render/partyAnimation.ts

@@ -27,65 +27,59 @@ export function partyRenderMotion(
   entity: Iwt2PartyEntityState,
   timeSeconds: number,
   attackPulse?: PartyAttackPulse,
+  motion: PartyRenderMotion = createPartyRenderMotion(),
 ): PartyRenderMotion {
   const speed = Math.hypot(entity.velocity.x, entity.velocity.y)
   const facingX = entity.facing.x < -0.05 ? -1 : 1
-  const motion: PartyRenderMotion = {
+  resetPartyRenderMotion(motion)
-    x: 0,
-    y: 0,
-    rotation: 0,
-    scaleX: 1,
-    scaleY: 1,
-  }
 
-  if (entity.health <= 0) return { ...motion, rotation: facingX * 0.08, scaleY: 0.92 }
+  if (entity.health <= 0) {
+    motion.rotation = facingX * 0.08
+    motion.scaleY = 0.92
+    return motion
+  }
   if (entity.status.stunnedSeconds > 0 || entity.status.knockedDownSeconds > 0) {
-    return { ...motion, y: 3, rotation: -facingX * 0.12, scaleY: 0.9 }
+    motion.y = 3
+    motion.rotation = -facingX * 0.12
+    motion.scaleY = 0.9
+    return motion
   }
 
   const attackProgress = attackPulse ? attackProgressFor(entity, timeSeconds, attackPulse) : 1
   if (attackProgress < 1) {
     const strike = Math.sin(attackProgress * Math.PI)
     const ranged = entity.projectileSpeed > 0
-    return {
+    motion.x = facingX * (ranged ? -3 : 4) * strike
-      ...motion,
+    motion.y = -1.5 * strike
-      x: facingX * (ranged ? -3 : 4) * strike,
+    motion.rotation = facingX * (ranged ? -0.05 : 0.09) * strike
-      y: -1.5 * strike,
+    motion.scaleX = 1 + (ranged ? 0.012 : 0.035) * strike
-      rotation: facingX * (ranged ? -0.05 : 0.09) * strike,
+    motion.scaleY = 1 - (ranged ? 0.006 : 0.018) * strike
-      scaleX: 1 + (ranged ? 0.012 : 0.035) * strike,
+    motion.tint = ranged ? 0xdff3ff : 0xffe1a6
-      scaleY: 1 - (ranged ? 0.006 : 0.018) * strike,
+    return motion
-      tint: ranged ? 0xdff3ff : 0xffe1a6,
-    }
   }
 
   if (entity.castSecondsRemaining > 0) {
     const pulse = 0.5 + Math.sin(timeSeconds * Math.PI * 12) * 0.5
-    return {
+    motion.y = -1 - pulse * 1.5
-      ...motion,
+    motion.scaleX = 1 + pulse * 0.012
-      y: -1 - pulse * 1.5,
+    motion.scaleY = 1 + pulse * 0.012
-      scaleX: 1 + pulse * 0.012,
+    motion.tint = entity.classId === 'mage' ? 0xefc4ff : 0xb9e3ff
-      scaleY: 1 + pulse * 0.012,
+    return motion
-      tint: entity.classId === 'mage' ? 0xefc4ff : 0xb9e3ff,
-    }
   }
 
   if (speed > 10) {
     const stride = Math.sin(timeSeconds * Math.PI * 9)
     const lift = Math.abs(stride) * Math.min(2.8, speed / 90)
-    return {
+    motion.y = -lift
-      ...motion,
+    motion.rotation = facingX * 0.025 * Math.min(1, speed / 190)
-      y: -lift,
+    motion.scaleY = 1 - Math.abs(stride) * 0.01
-      rotation: facingX * 0.025 * Math.min(1, speed / 190),
+    return motion
-      scaleY: 1 - Math.abs(stride) * 0.01,
-    }
   }
 
   const idle = Math.sin(timeSeconds * Math.PI * 2.2)
-  return {
+  motion.y = -Math.max(0, idle) * 0.9
-    ...motion,
+  motion.scaleY = 1 + Math.max(0, idle) * 0.008
-    y: -Math.max(0, idle) * 0.9,
+  return motion
-    scaleY: 1 + Math.max(0, idle) * 0.008,
-  }
 }
 
 export function isPartyAttackPulseActive(
@@ -101,17 +95,41 @@ export function partyWeaponLayerMotion(
   layer: Iwt2ClassWeaponLayer,
   timeSeconds: number,
   attackPulse?: PartyAttackPulse,
+  motion: PartyWeaponLayerMotion = createPartyWeaponLayerMotion(),
 ): PartyWeaponLayerMotion {
-  if (!attackPulse || entity.health <= 0) return { offsetXScale: 0, offsetYScale: 0, rotation: 0 }
+  resetPartyWeaponLayerMotion(motion)
+  if (!attackPulse || entity.health <= 0) return motion
   const progress = attackProgressFor(entity, timeSeconds, attackPulse)
-  if (progress >= 1) return { offsetXScale: 0, offsetYScale: 0, rotation: 0 }
+  if (progress >= 1) return motion
   const strike = Math.sin(progress * Math.PI)
   const attackMotion = layer.attackMotion
-  return {
+  motion.offsetXScale = (attackMotion?.offsetXScale ?? 0) * strike
-    offsetXScale: (attackMotion?.offsetXScale ?? 0) * strike,
+  motion.offsetYScale = (attackMotion?.offsetYScale ?? 0) * strike
-    offsetYScale: (attackMotion?.offsetYScale ?? 0) * strike,
+  motion.rotation = (attackMotion?.rotation ?? 0) * strike
-    rotation: (attackMotion?.rotation ?? 0) * strike,
+  return motion
-  }
+}
+
+function createPartyRenderMotion(): PartyRenderMotion {
+  return { x: 0, y: 0, rotation: 0, scaleX: 1, scaleY: 1 }
+}
+
+function resetPartyRenderMotion(motion: PartyRenderMotion) {
+  motion.x = 0
+  motion.y = 0
+  motion.rotation = 0
+  motion.scaleX = 1
+  motion.scaleY = 1
+  motion.tint = undefined
+}
+
+function createPartyWeaponLayerMotion(): PartyWeaponLayerMotion {
+  return { offsetXScale: 0, offsetYScale: 0, rotation: 0 }
+}
+
+function resetPartyWeaponLayerMotion(motion: PartyWeaponLayerMotion) {
+  motion.offsetXScale = 0
+  motion.offsetYScale = 0
+  motion.rotation = 0
 }
 
 function attackProgressFor(

src/modes/iwt2/render/scenes/BulldromeArenaScene.ts

@@ -2,12 +2,14 @@ import Phaser from 'phaser'
 import type { MovementVector } from '../../../../input'
 import { IWT2_BOSS_METADATA, type Iwt2BossId } from '../../content/bosses'
 import { IWT2_CLASS_METADATA, type Iwt2PlayerClassId } from '../../content/classes'
-import { bossRenderMotion } from '../bossAnimation'
+import { bossRenderMotion, type BossRenderMotion } from '../bossAnimation'
 import {
   isPartyAttackPulseActive,
   partyRenderMotion,
   partyWeaponLayerMotion,
   type PartyAttackPulse,
+  type PartyRenderMotion,
+  type PartyWeaponLayerMotion,
 } from '../partyAnimation'
 import type {
   Iwt2ArenaEvent,
@@ -41,10 +43,15 @@ type PartyLayerSprites = {
 
 export class BulldromeArenaScene extends Phaser.Scene {
   private deps: SceneDeps
+  private drawableEntities: DrawableEntity[] = []
   private arenaGraphics?: Phaser.GameObjects.Graphics
   private bossUnderlayGraphics?: Phaser.GameObjects.Graphics
   private entityGraphics?: Phaser.GameObjects.Graphics
   private telegraphGraphics?: Phaser.GameObjects.Graphics
+  private liveBossIds = new Set<string>()
+  private liveLabelIds = new Set<string>()
+  private livePartyIds = new Set<string>()
+  private liveProjectileIds = new Set<string>()
   private labels = new Map<string, Phaser.GameObjects.Text>()
   private bossSprites = new Map<string, Phaser.GameObjects.Image>()
   private partySprites = new Map<string, Phaser.GameObjects.Image>()
@@ -54,11 +61,15 @@ export class BulldromeArenaScene extends Phaser.Scene {
   private livePartyEffectIds = new Set<string>()
   private floatingCombatTexts = new Map<number, Phaser.GameObjects.Text>()
   private castGlowEffects = new Set<Phaser.GameObjects.Graphics>()
+  private currentEntityAnchors = new Map<string, FloatingCombatTextAnchor>()
   private lastEntityAnchors = new Map<string, FloatingCombatTextAnchor>()
+  private liveEntityAnchorIds = new Set<string>()
+  private bossMotionScratch: BossRenderMotion = { x: 0, y: 0, scaleX: 1, scaleY: 1, rotation: 0 }
+  private partyMotionScratch: PartyRenderMotion = { x: 0, y: 0, scaleX: 1, scaleY: 1, rotation: 0 }
+  private weaponMotionScratch: PartyWeaponLayerMotion = { offsetXScale: 0, offsetYScale: 0, rotation: 0 }
   private lastPartyAnimationEventId = 0
   private lastFloatingEventId = 0
   private lastStateTime = 0
-  private lastHudPublish = 0
 
   constructor(deps: SceneDeps) {
     super('bulldrome-arena')
@@ -66,7 +77,9 @@ export class BulldromeArenaScene extends Phaser.Scene {
   }
 
   preload() {
-    for (const metadata of Object.values(IWT2_BOSS_METADATA)) {
+    const encounterBossIds = new Set(this.deps.getState().bosses.map((boss) => boss.bossId))
+    for (const bossId of encounterBossIds) {
+      const metadata = IWT2_BOSS_METADATA[bossId]
       if (metadata.spriteUrl.endsWith('.svg')) {
         this.load.svg(bossSpriteKey(metadata.id), metadata.spriteUrl, { width: 144, height: 144 })
       } else {
@@ -92,7 +105,9 @@ export class BulldromeArenaScene extends Phaser.Scene {
     this.telegraphGraphics = this.add.graphics().setDepth(10)
     this.bossUnderlayGraphics = this.add.graphics().setDepth(20)
     this.entityGraphics = this.add.graphics().setDepth(35)
-    this.drawState(this.deps.getState())
+    const state = this.deps.getState()
+    this.drawArena(state)
+    this.drawState(state)
   }
 
   update(_: number, delta: number) {
@@ -102,13 +117,11 @@ export class BulldromeArenaScene extends Phaser.Scene {
 
   private drawState(state: Iwt2ArenaState) {
     if (!this.arenaGraphics || !this.entityGraphics || !this.telegraphGraphics) return
-    this.drawArena(state)
     this.drawTelegraphs(state)
     this.updatePartyAnimations(state)
     this.drawEntities(state)
     this.drawProjectiles(state)
     this.drawFloatingCombatTexts(state)
-    this.lastHudPublish += 1
   }
 
   private drawArena(state: Iwt2ArenaState) {
@@ -140,12 +153,30 @@ export class BulldromeArenaScene extends Phaser.Scene {
     bossUnderlay.clear()
     graphics.clear()
     for (const hazard of state.hazards) drawHazard(graphics, hazard)
-    const entities: DrawableEntity[] = [...state.party, ...state.hostileAdds, ...state.bosses]
+    const entities = this.drawableEntities
-    const liveLabelIds = new Set<string>(entities.filter((entity) => shouldDrawLabel(entity)).map((entity) => entity.id))
+    const liveBossIds = this.liveBossIds
-    const liveBossIds = new Set<string>(state.bosses.map((boss) => boss.id))
+    const liveLabelIds = this.liveLabelIds
-    const livePartyIds = new Set<string>(state.party.map((member) => member.id))
+    const livePartyIds = this.livePartyIds
+    entities.length = 0
+    liveBossIds.clear()
+    liveLabelIds.clear()
+    livePartyIds.clear()
+    for (const boss of state.bosses) {
+      entities.push(boss)
+      liveBossIds.add(boss.id)
+      if (shouldDrawLabel(boss)) liveLabelIds.add(boss.id)
+    }
+    for (const add of state.hostileAdds) {
+      entities.push(add)
+      if (shouldDrawLabel(add)) liveLabelIds.add(add.id)
+    }
+    for (const member of state.party) {
+      entities.push(member)
+      livePartyIds.add(member.id)
+      if (shouldDrawLabel(member)) liveLabelIds.add(member.id)
+    }
 
-    for (const entity of entities.sort(entitySort)) {
+    for (const entity of entities) {
       const stunned = entity.kind === 'party' && (entity.status.stunnedSeconds > 0 || entity.status.knockedDownSeconds > 0)
       const alpha = entity.health <= 0 ? 0.35 : stunned ? 0.55 : 1
       const color = entityColor(entity)
@@ -232,8 +263,10 @@ export class BulldromeArenaScene extends Phaser.Scene {
 
   private drawProjectiles(state: Iwt2ArenaState) {
     const graphics = this.entityGraphics!
-    const liveProjectileIds = new Set(state.projectiles.map((projectile) => projectile.id))
+    const liveProjectileIds = this.liveProjectileIds
+    liveProjectileIds.clear()
     for (const projectile of state.projectiles) {
+      liveProjectileIds.add(projectile.id)
       const spriteKey = projectileSpriteKey(projectile.projectileKind)
       if (this.textures.exists(spriteKey)) {
         let sprite = this.projectileSprites.get(projectile.id)
@@ -244,7 +277,6 @@ export class BulldromeArenaScene extends Phaser.Scene {
         const velocityAngle = Math.atan2(projectile.velocity.y, projectile.velocity.x)
         const size = projectileDisplaySize(projectile.projectileKind, projectile.radius)
         sprite
-          .setTexture(spriteKey)
           .setPosition(projectile.position.x, projectile.position.y)
           .setRotation(velocityAngle)
           .setDisplaySize(size.width, size.height)
@@ -280,14 +312,13 @@ export class BulldromeArenaScene extends Phaser.Scene {
     const width = entity.radius * (metadata.spriteWidthScale ?? 3.35)
     const height = entity.radius * (metadata.spriteHeightScale ?? 3.35)
     const yOffset = entity.radius * (metadata.spriteYOffsetScale ?? 0)
-    const motion = bossRenderMotion(entity, timeSeconds)
+    const motion = bossRenderMotion(entity, timeSeconds, this.bossMotionScratch)
     if (motion.tint) {
       sprite.setTint(motion.tint)
     } else {
       sprite.clearTint()
     }
     sprite
-      .setTexture(key)
       .setPosition(entity.position.x + motion.x, entity.position.y + yOffset + motion.y)
       .setDisplaySize(width * motion.scaleX, height * motion.scaleY)
       .setRotation(rotation + motion.rotation)
@@ -314,10 +345,9 @@ export class BulldromeArenaScene extends Phaser.Scene {
     }
 
     const baseHeight = entity.radius * (metadata.bodyHeightScale ?? 4.55)
-    const motion = partyRenderMotion(entity, timeSeconds, this.partyAttackPulses.get(entity.id))
+    const motion = partyRenderMotion(entity, timeSeconds, this.partyAttackPulses.get(entity.id), this.partyMotionScratch)
     applyMotionTint(sprites.body, motion.tint)
     sprites.body
-      .setTexture(classArenaBodySpriteKey(entity.classId))
       .setPosition(entity.position.x + motion.x, entity.position.y + entity.radius * 0.18 + motion.y)
       .setDisplaySize(baseHeight * (sprites.body.width / Math.max(1, sprites.body.height)) * motion.scaleX, baseHeight * motion.scaleY)
       .setRotation(motion.rotation)
@@ -335,7 +365,13 @@ export class BulldromeArenaScene extends Phaser.Scene {
       }
       const flipX = entity.facing.x < -0.05
       const facingSign = flipX ? -1 : 1
-      const layerMotion = partyWeaponLayerMotion(entity, layer, timeSeconds, this.partyAttackPulses.get(entity.id))
+      const layerMotion = partyWeaponLayerMotion(
+        entity,
+        layer,
+        timeSeconds,
+        this.partyAttackPulses.get(entity.id),
+        this.weaponMotionScratch,
+      )
       const layerHeight = entity.radius * layer.heightScale
       const positionX = entity.position.x + motion.x + facingSign * entity.radius * (layer.offsetXScale + layerMotion.offsetXScale)
       const positionY = entity.position.y + entity.radius * 0.18 + motion.y + entity.radius * (layer.offsetYScale + layerMotion.offsetYScale)
@@ -358,7 +394,6 @@ export class BulldromeArenaScene extends Phaser.Scene {
       })
       applyMotionTint(sprite, motion.tint)
       sprite
-        .setTexture(key)
         .setDepth(layer.drawOrder === 'behindBody' ? 38 : 42)
         .setPosition(positionX, positionY)
         .setDisplaySize(displayWidth, displayHeight)
@@ -420,7 +455,6 @@ export class BulldromeArenaScene extends Phaser.Scene {
     }
     accent
       .setVisible(true)
-      .setTexture(key)
       .setDepth(layer.drawOrder === 'behindBody' ? 37 : 41)
       .setPosition(positionX, positionY)
       .setDisplaySize(displayWidth * 1.08, displayHeight * 1.12)
@@ -446,14 +480,13 @@ export class BulldromeArenaScene extends Phaser.Scene {
     }
 
     const displayHeight = entity.radius * 4.55
-    const motion = partyRenderMotion(entity, timeSeconds, this.partyAttackPulses.get(entity.id))
+    const motion = partyRenderMotion(entity, timeSeconds, this.partyAttackPulses.get(entity.id), this.partyMotionScratch)
     if (motion.tint) {
       sprite.setTint(motion.tint)
     } else {
       sprite.clearTint()
     }
     sprite
-      .setTexture(key)
       .setPosition(entity.position.x + motion.x, entity.position.y + entity.radius * 0.18 + motion.y)
       .setDisplaySize(
         displayHeight * (sprite.width / Math.max(1, sprite.height)) * motion.scaleX,
@@ -541,6 +574,8 @@ export class BulldromeArenaScene extends Phaser.Scene {
   }
 
   private drawFloatingCombatTexts(state: Iwt2ArenaState) {
+    const currentEntityAnchors = this.currentEntityAnchors
+    updateEntityAnchors(currentEntityAnchors, this.liveEntityAnchorIds, state)
     if (state.time < this.lastStateTime) {
       this.lastFloatingEventId = 0
       for (const text of this.floatingCombatTexts.values()) text.destroy()
@@ -557,17 +592,21 @@ export class BulldromeArenaScene extends Phaser.Scene {
         this.lastFloatingEventId = Math.max(this.lastFloatingEventId, event.id)
         continue
       }
-      this.spawnFloatingCombatText(event, state)
+      this.spawnFloatingCombatText(event, currentEntityAnchors)
       this.lastFloatingEventId = Math.max(this.lastFloatingEventId, event.id)
     }
 
     this.lastStateTime = state.time
-    this.lastEntityAnchors = entityAnchors(state)
+    this.currentEntityAnchors = this.lastEntityAnchors
+    this.lastEntityAnchors = currentEntityAnchors
   }
 
-  private spawnFloatingCombatText(event: Iwt2ArenaEvent, state: Iwt2ArenaState) {
+  private spawnFloatingCombatText(
+    event: Iwt2ArenaEvent,
+    currentEntityAnchors: Map<string, FloatingCombatTextAnchor>,
+  ) {
     const anchor = event.targetId
-      ? entityAnchors(state).get(event.targetId) ?? this.lastEntityAnchors.get(event.targetId)
+      ? currentEntityAnchors.get(event.targetId) ?? this.lastEntityAnchors.get(event.targetId)
       : undefined
     if (!anchor || !event.value || event.value <= 0) return
 
@@ -630,11 +669,6 @@ export class BulldromeArenaScene extends Phaser.Scene {
   }
 }
 
-function entitySort(a: DrawableEntity, b: DrawableEntity): number {
-  const rank = { boss: 0, hostileAdd: 1, party: 2 } satisfies Record<DrawableEntity['kind'], number>
-  return rank[a.kind] - rank[b.kind]
-}
-
 function entityColor(entity: DrawableEntity): string {
   if (entity.kind === 'boss') return IWT2_BOSS_METADATA[entity.bossId].color
   if (entity.kind === 'hostileAdd') return '#f0b84f'
@@ -710,16 +744,38 @@ function shouldSpawnFloatingCombatText(event: Iwt2ArenaEvent): boolean {
     && event.targetId !== undefined
 }
 
-function entityAnchors(state: Iwt2ArenaState): Map<string, FloatingCombatTextAnchor> {
+function updateEntityAnchors(
-  const anchors = new Map<string, FloatingCombatTextAnchor>()
+  anchors: Map<string, FloatingCombatTextAnchor>,
-  for (const entity of [...state.party, ...state.hostileAdds, ...state.bosses]) {
+  liveIds: Set<string>,
+  state: Iwt2ArenaState,
+) {
+  liveIds.clear()
+  for (const entity of state.party) updateEntityAnchor(anchors, liveIds, entity)
+  for (const entity of state.hostileAdds) updateEntityAnchor(anchors, liveIds, entity)
+  for (const entity of state.bosses) updateEntityAnchor(anchors, liveIds, entity)
+  for (const id of anchors.keys()) {
+    if (!liveIds.has(id)) anchors.delete(id)
+  }
+}
+
+function updateEntityAnchor(
+  anchors: Map<string, FloatingCombatTextAnchor>,
+  liveIds: Set<string>,
+  entity: DrawableEntity,
+) {
+  liveIds.add(entity.id)
+  const anchor = anchors.get(entity.id)
+  if (!anchor) {
     anchors.set(entity.id, {
       kind: entity.kind,
-      position: { ...entity.position },
+      position: entity.position,
       radius: entity.radius,
     })
+    return
   }
-  return anchors
+  anchor.kind = entity.kind
+  anchor.position = entity.position
+  anchor.radius = entity.radius
 }
 
 function floatingTextYOffset(anchor: FloatingCombatTextAnchor): number {
@@ -792,9 +848,7 @@ function drawIndicator(graphics: Phaser.GameObjects.Graphics, indicator: Iwt2Are
   graphics.fillStyle(color, indicator.fillAlpha ?? (active ? 0.16 : 0.09))
 
   if (indicator.kind === 'lane') {
-    const points = laneDangerPolygon(indicator.start, indicator.end, indicator.width)
+    drawLaneDangerPath(graphics, indicator.start, indicator.end, indicator.width)
-    graphics.fillPoints(points, true)
-    graphics.strokePoints(points, true)
     return
   }
 
@@ -805,27 +859,25 @@ function drawIndicator(graphics: Phaser.GameObjects.Graphics, indicator: Iwt2Are
   }
 
   if (indicator.kind === 'cone') {
-    const points = coneDangerPolygon(
+    drawConeDangerPath(
+      graphics,
       indicator.origin,
       indicator.direction,
       indicator.range,
       indicator.angleRadians,
     )
-    graphics.fillPoints(points, true)
-    graphics.strokePoints(points, true)
     return
   }
 
   if (indicator.kind === 'arc') {
-    const points = arcDangerPolygon(
+    drawArcDangerPath(
+      graphics,
       indicator.position,
       indicator.direction,
       indicator.innerRadius,
       indicator.outerRadius,
       indicator.angleRadians,
     )
-    graphics.fillPoints(points, true)
-    graphics.strokePoints(points, true)
     return
   }
 
@@ -835,7 +887,8 @@ function drawIndicator(graphics: Phaser.GameObjects.Graphics, indicator: Iwt2Are
   graphics.strokeCircle(indicator.position.x, indicator.position.y, indicator.innerRadius)
 }
 
-function arcDangerPolygon(
+function drawArcDangerPath(
+  graphics: Phaser.GameObjects.Graphics,
   position: Iwt2Vec2,
   direction: Iwt2Vec2,
   innerRadius: number,
@@ -845,43 +898,50 @@ function arcDangerPolygon(
   const baseAngle = Math.atan2(direction.y, direction.x)
   const halfAngle = angleRadians / 2
   const segmentCount = 18
-  const points: Phaser.Math.Vector2[] = []
+  graphics.beginPath()
   for (let index = 0; index <= segmentCount; index += 1) {
     const t = index / segmentCount
     const angle = baseAngle - halfAngle + angleRadians * t
-    points.push(new Phaser.Math.Vector2(
+    const x = position.x + Math.cos(angle) * outerRadius
-      position.x + Math.cos(angle) * outerRadius,
+    const y = position.y + Math.sin(angle) * outerRadius
-      position.y + Math.sin(angle) * outerRadius,
+    if (index === 0) graphics.moveTo(x, y)
-    ))
+    else graphics.lineTo(x, y)
   }
   for (let index = segmentCount; index >= 0; index -= 1) {
     const t = index / segmentCount
     const angle = baseAngle - halfAngle + angleRadians * t
-    points.push(new Phaser.Math.Vector2(
+    graphics.lineTo(
       position.x + Math.cos(angle) * innerRadius,
       position.y + Math.sin(angle) * innerRadius,
-    ))
+    )
   }
-  return points
+  graphics.closePath().fillPath().strokePath()
 }
 
-function laneDangerPolygon(start: Iwt2Vec2, end: Iwt2Vec2, halfWidth: number) {
+function drawLaneDangerPath(
+  graphics: Phaser.GameObjects.Graphics,
+  start: Iwt2Vec2,
+  end: Iwt2Vec2,
+  halfWidth: number,
+) {
   const dx = end.x - start.x
   const dy = end.y - start.y
   const length = Math.max(1, Math.hypot(dx, dy))
-  const normal = {
+  const normalX = (-dy / length) * halfWidth
-    x: (-dy / length) * halfWidth,
+  const normalY = (dx / length) * halfWidth
-    y: (dx / length) * halfWidth,
+  graphics
-  }
+    .beginPath()
-  return [
+    .moveTo(start.x + normalX, start.y + normalY)
-    new Phaser.Math.Vector2(start.x + normal.x, start.y + normal.y),
+    .lineTo(end.x + normalX, end.y + normalY)
-    new Phaser.Math.Vector2(end.x + normal.x, end.y + normal.y),
+    .lineTo(end.x - normalX, end.y - normalY)
-    new Phaser.Math.Vector2(end.x - normal.x, end.y - normal.y),
+    .lineTo(start.x - normalX, start.y - normalY)
-    new Phaser.Math.Vector2(start.x - normal.x, start.y - normal.y),
+    .closePath()
-  ]
+    .fillPath()
+    .strokePath()
 }
 
-function coneDangerPolygon(
+function drawConeDangerPath(
+  graphics: Phaser.GameObjects.Graphics,
   origin: Iwt2Vec2,
   direction: Iwt2Vec2,
   range: number,
@@ -889,15 +949,15 @@ function coneDangerPolygon(
 ) {
   const baseAngle = Math.atan2(direction.y, direction.x)
   const halfAngle = angleRadians / 2
-  const points = [new Phaser.Math.Vector2(origin.x, origin.y)]
   const segmentCount = 14
+  graphics.beginPath().moveTo(origin.x, origin.y)
   for (let index = 0; index <= segmentCount; index += 1) {
     const t = index / segmentCount
     const angle = baseAngle - halfAngle + angleRadians * t
-    points.push(new Phaser.Math.Vector2(
+    graphics.lineTo(
       origin.x + Math.cos(angle) * range,
       origin.y + Math.sin(angle) * range,
-    ))
+    )
   }
-  return points
+  graphics.closePath().fillPath().strokePath()
 }

src/modes/iwt2/save/iwt2Repository.ts

@@ -10,13 +10,17 @@ import {
 import type { Iwt2BossId } from '../content/bosses'
 import {
   createDefaultIwt2GearProgress,
+  IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL,
   IWT2_GEAR_SLOTS,
+  IWT2_MAX_GEAR_LEVEL,
   iwt2GearUpgradeCosts,
   iwt2InfusionCosts,
   isIwt2InfusionUnlocked,
+  isIwt2PassiveInfusionUnlocked,
   type Iwt2GearLevel,
   type Iwt2GearProgress,
   type Iwt2GearSlotId,
+  type Iwt2PassiveInfusionId,
 } from '../content/gear'
 import {
   IWT2_INFUSION_ABILITIES,
@@ -97,14 +101,20 @@ export type Iwt2OnlineSaveResult = {
   save: Iwt2Save | null
 }
 
-const IWT2_SAVE_KEY = 'i-want-to-heal-2:save:v1'
+export const IWT2_LOCAL_SAVE_SLOTS = [1, 2, 3] as const
+export type Iwt2LocalSaveSlot = (typeof IWT2_LOCAL_SAVE_SLOTS)[number]
+export type Iwt2LocalSaveSlots = Record<Iwt2LocalSaveSlot, Iwt2Save | null>
 
-export function createDefaultIwt2Save(): Iwt2Save {
+const IWT2_LEGACY_SAVE_KEY = 'i-want-to-heal-2:save:v1'
+const IWT2_SAVE_MIGRATION_KEY = 'i-want-to-heal-2:save-slots:migrated:v1'
+const IWT2_ACTIVE_SAVE_SLOT_KEY = 'i-want-to-heal-2:active-save-slot:v1'
+
+export function createDefaultIwt2Save(characterName = 'Healer'): Iwt2Save {
   return {
     version: 2,
     updatedAt: Date.now(),
     character: {
-      name: 'Healer',
+      name: normalizeCharacterName(characterName),
       level: 1,
       experience: 0,
       healerStyle: 'dawnweaver',
@@ -126,7 +136,11 @@ function normalizeSave(value: unknown): Iwt2Save {
   if (candidate.version !== 1 && candidate.version !== 2) return createDefaultIwt2Save()
   return {
     version: 2,
-    updatedAt: typeof candidate.updatedAt === 'number' ? candidate.updatedAt : Date.now(),
+    updatedAt: typeof candidate.updatedAt === 'number'
+      && Number.isFinite(candidate.updatedAt)
+      && candidate.updatedAt > 0
+      ? candidate.updatedAt
+      : Date.now(),
     character: {
       name: candidate.character?.name || 'Healer',
       level: Math.max(1, Math.floor(candidate.character?.level ?? 1)),
@@ -145,11 +159,51 @@ function normalizeSave(value: unknown): Iwt2Save {
   }
 }
 
-export function loadIwt2Save(): Iwt2Save {
+function iwt2SaveSlotKey(slot: Iwt2LocalSaveSlot) {
+  return `i-want-to-heal-2:save:slot-${slot}:v1`
+}
+
+function migrateLegacyIwt2Save() {
+  if (window.localStorage.getItem(IWT2_SAVE_MIGRATION_KEY)) return
+  const legacySave = window.localStorage.getItem(IWT2_LEGACY_SAVE_KEY)
+  const firstSlotKey = iwt2SaveSlotKey(1)
+  if (legacySave && !window.localStorage.getItem(firstSlotKey)) {
+    window.localStorage.setItem(firstSlotKey, legacySave)
+  }
+  window.localStorage.setItem(IWT2_SAVE_MIGRATION_KEY, 'true')
+}
+
+export function activeIwt2SaveSlot(): Iwt2LocalSaveSlot {
+  const stored = Number(window.localStorage.getItem(IWT2_ACTIVE_SAVE_SLOT_KEY))
+  return IWT2_LOCAL_SAVE_SLOTS.includes(stored as Iwt2LocalSaveSlot)
+    ? stored as Iwt2LocalSaveSlot
+    : 1
+}
+
+export function selectActiveIwt2SaveSlot(slot: Iwt2LocalSaveSlot) {
+  window.localStorage.setItem(IWT2_ACTIVE_SAVE_SLOT_KEY, String(slot))
+}
+
+export function loadIwt2Save(slot = activeIwt2SaveSlot()): Iwt2Save {
+  return loadExistingIwt2Save(slot) ?? createDefaultIwt2Save()
+}
+
+export function loadExistingIwt2Save(slot = activeIwt2SaveSlot()): Iwt2Save | null {
+  migrateLegacyIwt2Save()
+  const serialized = window.localStorage.getItem(iwt2SaveSlotKey(slot))
+  if (!serialized) return null
   try {
-    return normalizeSave(JSON.parse(window.localStorage.getItem(IWT2_SAVE_KEY) ?? 'null'))
+    return normalizeSave(JSON.parse(serialized))
   } catch {
-    return createDefaultIwt2Save()
+    return null
+  }
+}
+
+export function loadIwt2SaveSlots(): Iwt2LocalSaveSlots {
+  return {
+    1: loadExistingIwt2Save(1),
+    2: loadExistingIwt2Save(2),
+    3: loadExistingIwt2Save(3),
   }
 }
 
@@ -171,11 +225,12 @@ export async function writeIwt2OnlineSave(save: Iwt2Save): Promise<Iwt2OnlineSav
   }
 }
 
-export function writeIwt2Save(save: Iwt2Save) {
+export function writeIwt2Save(save: Iwt2Save, slot = activeIwt2SaveSlot()) {
-  window.localStorage.setItem(IWT2_SAVE_KEY, JSON.stringify({
+  replaceIwt2Save(save, slot)
-    ...save,
+}
-    updatedAt: Date.now(),
+
-  }))
+export function replaceIwt2Save(save: Iwt2Save, slot = activeIwt2SaveSlot()) {
+  window.localStorage.setItem(iwt2SaveSlotKey(slot), JSON.stringify(normalizeSave(save)))
 }
 
 export function recordIwt2BossKill(
@@ -263,7 +318,7 @@ export function upgradeIwt2GearSlot(
 ): Iwt2Save {
   const classProgress = save.gearProgress[classId]
   const slot = classProgress.slots[slotId]
-  if (slot.level >= 5) throw new Error('Gear slot already at +5.')
+  if (slot.level >= IWT2_MAX_GEAR_LEVEL) throw new Error(`Gear slot already at +${IWT2_MAX_GEAR_LEVEL}.`)
   const costs = iwt2GearUpgradeCosts(classId, slotId, slot.level)
   const inventory = spendInventoryCosts(save.inventory, costs)
   return {
@@ -294,8 +349,10 @@ export function setIwt2InfusionAbility(
   const classProgress = save.gearProgress[classId]
   const ability = IWT2_INFUSION_ABILITIES[abilityId]
   if (!ability || ability.classId !== classId) throw new Error('Ability is not available for this class.')
-  if (!isIwt2InfusionUnlocked(classProgress)) throw new Error('Upgrade any gear slot to +5 first.')
+  if (!isIwt2InfusionUnlocked(classProgress)) throw new Error(`Upgrade any gear slot to +${IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL} first.`)
-  if (classProgress.slots[slotId].level < 5) throw new Error('Select a +5 gear slot to anchor the infusion cost.')
+  if (classProgress.slots[slotId].level < IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL) {
+    throw new Error(`Select a +${IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL} gear slot to anchor the infusion cost.`)
+  }
   if (classProgress.infusionAbilityId === abilityId) return save
   const inventory = spendInventoryCosts(save.inventory, iwt2InfusionCosts(classId, slotId, abilityId))
   return {
@@ -312,6 +369,27 @@ export function setIwt2InfusionAbility(
   }
 }
 
+export function setIwt2PassiveInfusion(
+  save: Iwt2Save,
+  passiveInfusionId: Iwt2PassiveInfusionId,
+): Iwt2Save {
+  if (!isIwt2PassiveInfusionUnlocked(save.gearProgress)) {
+    throw new Error(`Upgrade any gear slot to +${IWT2_MAX_GEAR_LEVEL} first.`)
+  }
+  if (save.gearProgress.healer.passiveInfusionId === passiveInfusionId) return save
+  return {
+    ...save,
+    updatedAt: Date.now(),
+    gearProgress: {
+      ...save.gearProgress,
+      healer: {
+        ...save.gearProgress.healer,
+        passiveInfusionId,
+      },
+    },
+  }
+}
+
 export function canAffordIwt2Costs(save: Iwt2Save, costs: Array<{ itemId: string, quantity: number }>): boolean {
   return costs.every((cost) => inventoryQuantity(save.inventory, cost.itemId) >= cost.quantity)
 }
@@ -450,6 +528,7 @@ function normalizeGearProgress(value: unknown): Iwt2GearProgress {
     const classProgress = rawClassProgress as {
       slots?: Partial<Record<Iwt2GearSlotId, { level?: unknown }>>
       infusionAbilityId?: unknown
+      passiveInfusionId?: unknown
     }
     for (const slotId of IWT2_GEAR_SLOTS) {
       next[classId].slots[slotId] = {
@@ -461,6 +540,10 @@ function normalizeGearProgress(value: unknown): Iwt2GearProgress {
       && isIwt2InfusionUnlocked(next[classId])
       ? infusionAbilityId as Iwt2InfusionAbilityId
       : null
+    next[classId].passiveInfusionId = classId === 'healer'
+      && isIwt2PassiveInfusionUnlocked(next)
+      ? asPassiveInfusionId(classProgress.passiveInfusionId)
+      : null
   }
   return next
 }
@@ -470,10 +553,15 @@ function cloneGearProgress(progress: Iwt2GearProgress): Iwt2GearProgress {
 }
 
 function asGearLevel(value: unknown): Iwt2GearLevel {
-  const level = Math.max(0, Math.min(5, Math.floor(Number(value) || 0)))
+  const level = Math.max(0, Math.min(IWT2_MAX_GEAR_LEVEL, Math.floor(Number(value) || 0)))
   return level as Iwt2GearLevel
 }
 
+function asPassiveInfusionId(value: unknown): Iwt2PassiveInfusionId | null {
+  if (typeof value !== 'string' || value === 'revive-party-members') return null
+  return value as Iwt2PassiveInfusionId
+}
+
 function normalizeInventory(value: unknown): Iwt2InventoryItem[] {
   if (!Array.isArray(value)) return []
   const byId = new Map<string, Iwt2InventoryItem>()

src/modes/iwt2/screens/BossArenaScreen.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useMemo, useRef, useState, type CSSProperties } from 'react'
+import { lazy, Suspense, useCallback, useEffect, useMemo, useRef, useState, type CSSProperties } from 'react'
 import type { MovementVector } from '../../../input'
 import { useGameAction, useInput, useMovementVectorRef } from '../../../input'
 import {
@@ -12,9 +12,8 @@ import {
   tickIwt2Arena,
   type Iwt2ArenaState,
 } from '../sim/arenaState'
-import type { Iwt2EntityId } from '../sim'
+import type { Iwt2ArenaBounds, Iwt2EntityId } from '../sim'
 import { castIwt2HealerAbility } from '../sim'
-import { PhaserArena } from '../render/PhaserArena'
 import {
   recordIwt2BossKillReward,
   type Iwt2BossDropAward,
@@ -45,25 +44,37 @@ import {
   IWT2_BARKSKIN_HOT_BONUS_BUFF_ID,
   IWT2_SUN_WARD_DAMAGE_REDUCTION_BUFF_ID,
 } from '../content/roguelike'
+import { createIwt2PvpNormalizedGearProgress } from '../content/pvpGearNormalization'
+
+const PhaserArena = lazy(() => import('../render/PhaserArena').then((module) => ({
+  default: module.PhaserArena,
+})))
 
 type ArenaStatus = 'playing' | 'paused' | 'victory' | 'defeat'
+type PvpResultReason = 'opponent-defeated' | null
 type OverlayAction = 'primary' | 'requeue' | 'menu'
 type OverlayNavEntry = {
   action: OverlayAction
   row: number
+  column: number
 }
 
 const DEFAULT_OVERLAY_NAV_ENTRIES: OverlayNavEntry[] = [
-  { action: 'primary', row: 0 },
+  { action: 'primary', row: 0, column: 0 },
-  { action: 'menu', row: 1 },
+  { action: 'menu', row: 1, column: 0 },
 ]
 const PVP_RESULT_OVERLAY_NAV_ENTRIES: OverlayNavEntry[] = [
-  { action: 'primary', row: 0 },
+  { action: 'primary', row: 0, column: 0 },
-  { action: 'requeue', row: 1 },
+  { action: 'requeue', row: 0, column: 1 },
-  { action: 'menu', row: 2 },
+  { action: 'menu', row: 0, column: 2 },
 ]
 const EMPTY_ROGUELIKE_BUFFS: Iwt2RoguelikeSelfBuffId[] = []
 const IWT2_PVP_BOSS_HEALTH_MULTIPLIER = 0.7
+const IWT2_TOP_PARTY_RAIL_WIDTH = 172
+const IWT2_THOR_TOP_PARTY_RAIL_WIDTH = 154
+const IWT2_THOR_TOP_BREAKPOINT_WIDTH = 1000
+const IWT2_THOR_TOP_BREAKPOINT_HEIGHT = 620
+const IWT2_HUD_PUBLISH_INTERVAL_SECONDS = 0.1
 
 type BossArenaScreenProps = {
   bossId: Iwt2BossId
@@ -76,9 +87,11 @@ type BossArenaScreenProps = {
   onPvpRequeue?: () => void
   onSaveUpdated: (save: Iwt2Save) => void
   roguelikeRun?: {
+    bossesDefeated: number
     buffs: Iwt2RoguelikeSelfBuffId[]
     contentType: Iwt2RoguelikeContentType
     debuffs: Iwt2RoguelikeOpponentDebuffId[]
+    greenCoinThreshold: number
     onVictory: () => void
     stage: number
     variant: Iwt2RoguelikeVariant
@@ -88,7 +101,12 @@ type BossArenaScreenProps = {
 export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save, onBack, onMainMenu, onPvpRequeue, onSaveUpdated, roguelikeRun }: BossArenaScreenProps) {
   const bossMetadata = IWT2_BOSS_METADATA[bossId]
   const pvpRoguelike = roguelikeRun?.variant === 'pvp'
-  const pveGearActive = roguelikeRun?.variant !== 'pvp'
+  const pvpNormalizedGearProgress = useMemo(() => createIwt2PvpNormalizedGearProgress(), [])
+  const activeGearProgress = pvpRoguelike
+    ? pvpNormalizedGearProgress
+    : roguelikeRun?.variant !== 'pvp'
+      ? save.gearProgress
+      : undefined
   const bossHealthScale = roguelikeRun ? roguelikeBossHealthScale(roguelikeRun.stage) : 1
   const difficultyHealthScale = difficulty?.healthMultiplier ?? 1
   const difficultyDamageScale = difficulty?.damageMultiplier ?? 1
@@ -103,6 +121,7 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
   const pvpBossHealthScale = pvpRoguelike ? IWT2_PVP_BOSS_HEALTH_MULTIPLIER : 1
   const combinedBossHealthScale = bossHealthScale * difficultyHealthScale * pvpBossHealthScale
   const combinedDamageScale = difficultyDamageScale * roguelikeDamageScale
+  const arenaBounds = useMemo(() => createTopScreenArenaBounds(), [])
   const [arenaState, setArenaState] = useState<Iwt2ArenaState>(() => createArenaState(
     bossId,
     bossIds,
@@ -110,21 +129,26 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
     combinedDamageScale,
     roguelikeBuffs,
     createPressureState(roguelikeStage, roguelikeContentType),
-    pveGearActive ? save.gearProgress : undefined,
+    activeGearProgress,
+    arenaBounds,
   ))
   const [opponentArenaState, setOpponentArenaState] = useState<Iwt2ArenaState | null>(() => (
     pvpRoguelike
-      ? createInitialIwt2ArenaState(
+      ? createArenaState(
         bossId,
         bossIds,
         combinedBossHealthScale,
         combinedDamageScale,
+        EMPTY_ROGUELIKE_BUFFS,
         createPressureState(roguelikeStage, roguelikeContentType),
+        activeGearProgress,
+        arenaBounds,
       )
       : null
   ))
   const [abilityCooldowns, setAbilityCooldowns] = useState<Record<string, number>>({})
   const [status, setStatus] = useState<ArenaStatus>('playing')
+  const [pvpResultReason, setPvpResultReason] = useState<PvpResultReason>(null)
   const [selectedOverlayAction, setSelectedOverlayAction] = useState<OverlayAction>('primary')
   const [selectedPartyId, setSelectedPartyId] = useState<Iwt2EntityId>('player-healer')
   const [dropAwards, setDropAwards] = useState<Iwt2BossDropAward[]>([])
@@ -137,7 +161,6 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
   const saveRef = useRef(save)
   const recordedKillIdsRef = useRef<Set<Iwt2BossId>>(new Set())
   const lastPublishTimeRef = useRef(0)
-  const lastHudSignatureRef = useRef('')
   const abilityCooldownsRef = useRef<Record<string, number>>({})
   const movementRef = useMovementVectorRef(status === 'playing')
   const {
@@ -149,14 +172,6 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
   const { enabled: dualScreenEnabled } = useDualScreen()
   const activeBindings = bindings[lastDevice]
 
-  useEffect(() => {
-    stateRef.current = arenaState
-  }, [arenaState])
-
-  useEffect(() => {
-    opponentStateRef.current = opponentArenaState
-  }, [opponentArenaState])
-
   useEffect(() => {
     statusRef.current = status
   }, [status])
@@ -182,20 +197,24 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
       combinedDamageScale,
       roguelikeBuffs,
       pressureState,
-      pveGearActive ? save.gearProgress : undefined,
+      activeGearProgress,
+      arenaBounds,
     )
     const nextOpponentState = pvpRoguelike
-      ? createInitialIwt2ArenaState(
+      ? createArenaState(
         bossId,
         bossIds,
         combinedBossHealthScale,
         combinedDamageScale,
+        EMPTY_ROGUELIKE_BUFFS,
         pressureState,
+        activeGearProgress,
+        arenaBounds,
       )
       : null
     recordedKillIdsRef.current = new Set()
     abilityCooldownsRef.current = {}
-    lastHudSignatureRef.current = arenaHudSignature(next)
+    lastPublishTimeRef.current = next.time
     stateRef.current = next
     opponentStateRef.current = nextOpponentState
     setArenaState(next)
@@ -204,16 +223,19 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
     setDropAwards([])
     setPetAwards([])
     setSelectedOverlayAction('primary')
+    setPvpResultReason(null)
     setStatus('playing')
-  }, [bossId, bossIds, combinedBossHealthScale, combinedDamageScale, pveGearActive, pvpRoguelike, roguelikeBuffs, roguelikeContentType, roguelikeStage, save.gearProgress])
+  }, [activeGearProgress, arenaBounds, bossId, bossIds, combinedBossHealthScale, combinedDamageScale, pvpRoguelike, roguelikeBuffs, roguelikeContentType, roguelikeStage])
 
-  const showOverlay = useCallback((nextStatus: Exclude<ArenaStatus, 'playing'>) => {
+  const showOverlay = useCallback((nextStatus: Exclude<ArenaStatus, 'playing'>, nextPvpResultReason: PvpResultReason = null) => {
     setSelectedOverlayAction('primary')
+    setPvpResultReason(nextPvpResultReason)
     statusRef.current = nextStatus
     setStatus(nextStatus)
   }, [])
 
   const resumeArena = useCallback(() => {
+    setPvpResultReason(null)
     statusRef.current = 'playing'
     setStatus('playing')
   }, [])
@@ -222,18 +244,21 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
     () => {
       const baseAbilities = abilitiesForHealer(
         save.character.healerStyle,
-        pveGearActive ? save.gearProgress.healer.infusionAbilityId : null,
+        activeGearProgress?.healer.infusionAbilityId ?? null,
       )
-      const gearAbilities = pveGearActive
+      const gearAbilities = activeGearProgress
-        ? applyIwt2PveGearToHealerAbilities(baseAbilities, save.gearProgress)
+        ? applyIwt2PveGearToHealerAbilities(baseAbilities, activeGearProgress)
         : baseAbilities
+      const passiveInfusionBuffs = activeGearProgress?.healer.passiveInfusionId
+        ? [activeGearProgress.healer.passiveInfusionId]
+        : []
       return applyRoguelikeModifiers(
         gearAbilities,
-        roguelikeRun?.buffs ?? [],
+        [...passiveInfusionBuffs, ...(roguelikeRun?.buffs ?? [])],
         roguelikeRun?.debuffs ?? [],
       )
     },
-    [pveGearActive, roguelikeRun?.buffs, roguelikeRun?.debuffs, save.character.healerStyle, save.gearProgress],
+    [activeGearProgress, roguelikeRun?.buffs, roguelikeRun?.debuffs, save.character.healerStyle],
   )
 
   const castAbility = useCallback((ability: Iwt2HealerAbility) => {
@@ -248,7 +273,7 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
     }
     abilityCooldownsRef.current = nextCooldowns
     stateRef.current = result.state
-    lastHudSignatureRef.current = arenaHudSignature(result.state)
+    lastPublishTimeRef.current = result.state.time
     setAbilityCooldowns(nextCooldowns)
     setArenaState(result.state)
   }, [])
@@ -259,12 +284,18 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
       const active = entries.find((entry) => entry.action === current) ?? entries[0]
       const candidates = entries.filter((entry) => {
         if (entry.action === current) return false
-        if (action === 'navigateUp') return entry.row < active.row
+        if (action === 'navigateLeft') return entry.row === active.row && entry.column < active.column
-        if (action === 'navigateDown') return entry.row > active.row
+        if (action === 'navigateRight') return entry.row === active.row && entry.column > active.column
+        if (action === 'navigateUp') return entry.column === active.column && entry.row < active.row
+        if (action === 'navigateDown') return entry.column === active.column && entry.row > active.row
         return false
       })
       if (candidates.length === 0) return current
-      candidates.sort((a, b) => Math.abs(a.row - active.row) - Math.abs(b.row - active.row))
+      candidates.sort((a, b) => {
+        const aDistance = Math.abs(a.row - active.row) + Math.abs(a.column - active.column)
+        const bDistance = Math.abs(b.row - active.row) + Math.abs(b.column - active.column)
+        return aDistance - bDistance
+      })
       return candidates[0]?.action ?? current
     })
   }, [pvpRoguelike])
@@ -305,7 +336,7 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
         return
       }
       if (action === 'back') {
-        if (statusRef.current === 'paused') resumeArena()
+        if (device === 'pc' && statusRef.current === 'paused') resumeArena()
         return
       }
     }
@@ -337,6 +368,7 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
       return
     }
     if (action.startsWith('targetParty')) {
+      if (statusRef.current !== 'playing') return
       const index = Number(action.replace('targetParty', '')) - 1
       const target = stateRef.current.party[index]
       if (target) setSelectedPartyId(target.id)
@@ -375,7 +407,7 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
       for (const defeatedBoss of newlyDefeatedBosses) {
         nextRecordedIds.add(defeatedBoss.bossId)
         const reward = recordIwt2BossKillReward(updatedSave, defeatedBoss.bossId, {
-          difficultySlug,
+          difficultySlug: rewardDifficultySlugForKill(roguelikeRun, newDropAwards.length, difficultySlug),
           experienceMultiplier,
         })
         updatedSave = reward.save
@@ -389,25 +421,26 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
       onSaveUpdated(updatedSave)
     }
 
-    if (next.bosses.every((boss) => boss.health <= 0)) {
+    const playerCleared = next.bosses.every((boss) => boss.health <= 0)
-      if (pvpRoguelike && roguelikeRun) {
+    const playerDefeated = next.party.every((member) => member.health <= 0)
+    const opponentCleared = Boolean(nextOpponentState?.bosses.every((boss) => boss.health <= 0))
+    const opponentDefeated = Boolean(nextOpponentState?.party.every((member) => member.health <= 0))
+    if (!pvpRoguelike && playerCleared) {
+      showOverlay('victory')
+    } else if (pvpRoguelike && playerDefeated) {
+      showOverlay('defeat')
+    } else if (pvpRoguelike && playerCleared && opponentDefeated) {
+      showOverlay('victory', 'opponent-defeated')
+    } else if (pvpRoguelike && playerCleared && opponentCleared && roguelikeRun) {
       statusRef.current = 'victory'
       setStatus('victory')
       roguelikeRun.onVictory()
-      } else {
+    } else if (!pvpRoguelike && playerDefeated) {
-        showOverlay('victory')
-      }
-    } else if (next.party.every((member) => member.health <= 0)) {
       showOverlay('defeat')
     }
 
-    const hudSignature = arenaHudSignature(next)
+    const fightEnded = statusRef.current !== 'playing'
-    if (
+    if (fightEnded || next.time - lastPublishTimeRef.current >= IWT2_HUD_PUBLISH_INTERVAL_SECONDS) {
-      hudSignature !== lastHudSignatureRef.current
-      || next.time - lastPublishTimeRef.current >= 0.08
-      || next.bosses.some((boss) => boss.health <= 0)
-    ) {
-      lastHudSignatureRef.current = hudSignature
       lastPublishTimeRef.current = next.time
       setArenaState(next)
       if (pvpRoguelike) setOpponentArenaState(nextOpponentState)
@@ -433,7 +466,9 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
       ? 'Rematch'
       : 'Restart'
   const overlayTitle = status === 'victory'
-    ? `${bossTitle} Down`
+    ? pvpResultReason === 'opponent-defeated'
+      ? 'CPU Rival Falls'
+      : `${bossTitle} Down`
     : status === 'defeat'
       ? 'Party Defeated'
       : 'Arena Paused'
@@ -501,12 +536,15 @@ export function BossArenaScreen({ bossId, bossIds, difficulty, modeLabel, save,
             targetBindings={targetBindings}
           />
 
+          <Suspense fallback={<div className="iwt2-phaser-host iwt2-arena-loading" role="status">Loading arena...</div>}>
             <PhaserArena
+              active={status === 'playing'}
               movementRef={movementRef}
               onStep={onStep}
               selectedPartyIdRef={selectedPartyIdRef}
               stateRef={stateRef}
             />
+          </Suspense>
           {status === 'paused' && (
             <div className="pause-screen iwt2-arena-overlay is-paused" data-game-nav-active="true" role="dialog" aria-modal="true">
               <div>
@@ -643,31 +681,22 @@ function roguelikeBossHealthScale(stage: number): number {
   return 1 + Math.max(0, stage - 1) * 0.1
 }
 
+function rewardDifficultySlugForKill(
+  roguelikeRun: BossArenaScreenProps['roguelikeRun'] | undefined,
+  defeatedEarlierThisArena: number,
+  fallbackSlug: string,
+): string {
+  if (!roguelikeRun) return fallbackSlug
+  return roguelikeRun.bossesDefeated + defeatedEarlierThisArena >= roguelikeRun.greenCoinThreshold
+    ? 'veteran'
+    : fallbackSlug
+}
+
 function overlayNavEntriesFor(status: ArenaStatus, pvpRoguelike: boolean): OverlayNavEntry[] {
   if (pvpRoguelike && (status === 'victory' || status === 'defeat')) return PVP_RESULT_OVERLAY_NAV_ENTRIES
   return DEFAULT_OVERLAY_NAV_ENTRIES
 }
 
-function arenaHudSignature(state: Iwt2ArenaState): string {
-  return [
-    ...state.bosses.map((boss) => [
-      boss.id,
-      Math.ceil(boss.health),
-      boss.attackPhase,
-    ].join(':')),
-    state.hostileAdds.length,
-    state.hazards.length,
-    ...state.party.map((member) => [
-      member.id,
-      Math.ceil(member.health),
-      Math.ceil(member.shield),
-      Math.ceil(member.mana),
-      Math.ceil(Math.max(member.status.stunnedSeconds, member.status.knockedDownSeconds) * 10),
-      member.hotEffects.map((effect) => `${effect.id}:${Math.ceil(effect.remainingSeconds)}:${Math.ceil(effect.nextTickInSeconds * 10)}`).join(','),
-    ].join(':')),
-  ].join('|')
-}
-
 function formatBossEncounterTitle(bosses: Iwt2ArenaState['bosses']): string {
   return bosses
     .map((boss) => IWT2_BOSS_METADATA[boss.bossId].name)
@@ -701,6 +730,7 @@ function createArenaState(
   buffs: Iwt2RoguelikeSelfBuffId[],
   roguelikePressure: ReturnType<typeof createPressureState>,
   gearProgress?: Iwt2Save['gearProgress'],
+  bounds?: Iwt2ArenaBounds,
 ): Iwt2ArenaState {
   const baseState = createInitialIwt2ArenaState(
     bossId,
@@ -708,6 +738,7 @@ function createArenaState(
     bossHealthScale,
     partyDamageTakenScale,
     roguelikePressure,
+    bounds,
   )
   const state = gearProgress ? applyIwt2PveGearStats(baseState, gearProgress) : baseState
   const shieldedDamageTakenMultiplier = shieldedDamageTakenMultiplierForBuffs(buffs)
@@ -723,6 +754,17 @@ function createArenaState(
   }
 }
 
+function createTopScreenArenaBounds(): Iwt2ArenaBounds {
+  if (typeof window === 'undefined') return { width: 960, height: 540 }
+  const thorTopLayout = window.innerWidth <= IWT2_THOR_TOP_BREAKPOINT_WIDTH
+    && window.innerHeight <= IWT2_THOR_TOP_BREAKPOINT_HEIGHT
+  const railWidth = thorTopLayout ? IWT2_THOR_TOP_PARTY_RAIL_WIDTH : IWT2_TOP_PARTY_RAIL_WIDTH
+  return {
+    width: Math.max(320, Math.round(window.innerWidth - railWidth)),
+    height: Math.max(240, Math.round(window.innerHeight)),
+  }
+}
+
 function createPressureState(
   stage: number | undefined,
   contentType: Iwt2RoguelikeContentType | undefined,

src/modes/iwt2/screens/Iwt2ShellScreens.tsx

@@ -9,9 +9,9 @@ import {
 import { useDualScreen, useDualScreenWorkshopPublisher, type DualScreenWorkshopState } from '../../../dualScreen'
 import { getGameMode } from '../../../gameRepository'
 import {
-  createDefaultIwt2Save,
   loadIwt2OnlineSave,
   setIwt2InfusionAbility,
+  setIwt2PassiveInfusion,
   updateIwt2CharacterSettings,
   upgradeIwt2GearSlot,
   canAffordIwt2Costs,
@@ -40,6 +40,8 @@ import {
   IWT2_HEALER_ORDER,
 } from '../content/healerAbilities'
 import {
+  buildIwt2SelfBuffChoices,
+  IWT2_REVIVE_PARTY_CHOICE,
   type Iwt2RoguelikeChoice,
   type Iwt2RoguelikeContentType,
   type Iwt2RoguelikeOpponentDebuffId,
@@ -51,9 +53,13 @@ import {
   IWT2_GEAR_SLOT_RECIPES,
   IWT2_GEAR_SLOTS,
   IWT2_GEAR_STAT_LABELS,
+  IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL,
+  IWT2_MAX_GEAR_LEVEL,
   iwt2GearUpgradeCosts,
   iwt2InfusionCosts,
   isIwt2InfusionUnlocked,
+  isIwt2PassiveInfusionUnlocked,
+  type Iwt2PassiveInfusionId,
   type Iwt2GearStatId,
   type Iwt2GearSlotId,
 } from '../content/gear'
@@ -144,6 +150,7 @@ type Iwt2GearNavEntry =
   | { kind: 'slot', key: string, row: number, column: number, slotId: Iwt2GearSlotId }
   | { kind: 'upgrade', key: string, row: number, column: number, disabled: boolean }
   | { kind: 'infusion', key: string, row: number, column: number, abilityId: Iwt2InfusionAbilityId, disabled: boolean }
+  | { kind: 'passiveInfusion', key: string, row: number, column: number, passiveId: Iwt2PassiveInfusionId, disabled: boolean }
 
 const IWT2_HUNTER_PROFILE_DROP_COLUMNS = 6
 const IWT2_NAME_MAX_LENGTH = 18
@@ -1256,7 +1263,7 @@ export function Iwt2RoguelikeUpgradeScreen({
       setSelectedIndex((current) => moveUpgradeSelection(entries, current, action))
       return
     }
-    if (action === 'back' || action === 'pause') return
+    if (action === 'back') onBack()
   })
 
   return (
@@ -1547,33 +1554,10 @@ export function Iwt2HunterProfileScreen({
 
   function moveSelection(action: InputAction) {
     if (!action.startsWith('navigate') || navEntries.length === 0) return
-    setSelectedIndex((current) => {
+    const nextIndex = moveHunterProfileSelection(navEntries, selectedIndex, action)
-      const bounded = Math.min(current, navEntries.length - 1)
+    const nextEntry = navEntries[nextIndex]
-      const active = navEntries[bounded]
+    setSelectedIndex(nextIndex)
-      if (!active) return 0
+    if (nextEntry?.kind === 'item') setFocusedItemKey(nextEntry.itemKey)
-      const candidates = navEntries
-        .map((entry, index) => ({ entry, index }))
-        .filter(({ index }) => index !== bounded)
-        .filter(({ entry }) => {
-          if (action === 'navigateLeft') return entry.column < active.column
-          if (action === 'navigateRight') return entry.column > active.column
-          if (action === 'navigateUp') return entry.row < active.row
-          return entry.row > active.row
-        })
-      if (candidates.length === 0) return bounded
-      candidates.sort((a, b) => {
-        const aPrimary = Math.abs(a.entry.row - active.row) + Math.abs(a.entry.column - active.column)
-        const bPrimary = Math.abs(b.entry.row - active.row) + Math.abs(b.entry.column - active.column)
-        const aSecondary = action === 'navigateLeft' || action === 'navigateRight'
-          ? Math.abs(a.entry.row - active.row)
-          : Math.abs(a.entry.column - active.column)
-        const bSecondary = action === 'navigateLeft' || action === 'navigateRight'
-          ? Math.abs(b.entry.row - active.row)
-          : Math.abs(b.entry.column - active.column)
-        return aPrimary - bPrimary || aSecondary - bSecondary || a.index - b.index
-      })
-      return candidates[0]?.index ?? bounded
-    })
   }
 
   function openEntry(entry: Iwt2HunterProfileNavEntry | undefined) {
@@ -1863,6 +1847,7 @@ function Iwt2ProfileNameEditor({
       <label>
         <span>Profile Name</span>
         <input
+          data-controller-nav="skip"
           maxLength={IWT2_NAME_MAX_LENGTH}
           onChange={(event) => setDraft(event.target.value.slice(0, IWT2_NAME_MAX_LENGTH))}
           value={draft}
@@ -1901,38 +1886,42 @@ export function Iwt2CloudSaveScreen({
   const [onlineSave, setOnlineSave] = useState<Iwt2Save | null>(null)
   const [syncingOnlineSave, setSyncingOnlineSave] = useState(false)
   const [message, setMessage] = useState('')
+  const statusMessage = message || (!onlineBackupsAvailable ? 'Online save unavailable in offline mode.' : '')
+
+  const checkOnlineSave = useCallback(async (isCancelled: () => boolean) => {
+    setSyncingOnlineSave(true)
+    setMessage('Checking online save...')
+    try {
+      const result = await loadIwt2OnlineSave()
+      if (isCancelled()) return
+      setOnlineSave(result.save)
+      setMessage(result.save ? 'Online save loaded.' : 'No online save yet.')
+    } catch (reason) {
+      if (isCancelled()) return
+      setOnlineSave(null)
+      setMessage(reason instanceof Error ? reason.message : 'Unable to check online save.')
+    } finally {
+      if (!isCancelled()) setSyncingOnlineSave(false)
+    }
+  }, [])
 
   useEffect(() => {
     let cancelled = false
     if (!onlineBackupsAvailable) {
-      setOnlineSave(null)
-      setMessage('Online save unavailable in offline mode.')
       return () => {
         cancelled = true
       }
     }
-    setSyncingOnlineSave(true)
+    const timer = window.setTimeout(() => {
-    setMessage('Checking online save...')
+      void checkOnlineSave(() => cancelled)
-    loadIwt2OnlineSave()
+    }, 0)
-      .then((result) => {
-        if (cancelled) return
-        setOnlineSave(result.save)
-        setMessage(result.save ? 'Online save loaded.' : 'No online save yet.')
-      })
-      .catch((reason) => {
-        if (cancelled) return
-        setOnlineSave(null)
-        setMessage(reason instanceof Error ? reason.message : 'Unable to check online save.')
-      })
-      .finally(() => {
-        if (!cancelled) setSyncingOnlineSave(false)
-      })
     return () => {
       cancelled = true
+      window.clearTimeout(timer)
     }
-  }, [onlineBackupsAvailable])
+  }, [checkOnlineSave, onlineBackupsAvailable])
 
-  const useLocalSave = useCallback(async () => {
+  const handleUseLocalSave = useCallback(async () => {
     if (!onlineBackupsAvailable) {
       setMessage('Using local save. Sign in online to update the server copy.')
       return
@@ -1950,16 +1939,11 @@ export function Iwt2CloudSaveScreen({
     }
   }, [onlineBackupsAvailable, save])
 
-  const useOnlineSave = useCallback(() => {
+  const handleUseOnlineSave = useCallback(() => {
-    if (!onlineSave) return
+    if (!onlineBackupsAvailable || !onlineSave) return
     onSaveUpdated(onlineSave)
     setMessage('Local save now uses online progress.')
-  }, [onlineSave, onSaveUpdated])
+  }, [onlineBackupsAvailable, onlineSave, onSaveUpdated])
-
-  const useNewSave = useCallback(() => {
-    onSaveUpdated(createDefaultIwt2Save())
-    setMessage('Started a new local IWT2 save.')
-  }, [onSaveUpdated])
 
   const actions = useMemo<Iwt2NavAction[]>(() => withBackAction([
     {
@@ -1969,7 +1953,7 @@ export function Iwt2CloudSaveScreen({
       value: onlineBackupsAvailable ? 'Upload' : 'Current',
       disabled: syncingOnlineSave,
       onConfirm: () => {
-        void useLocalSave()
+        void handleUseLocalSave()
       },
     },
     {
@@ -1977,30 +1961,22 @@ export function Iwt2CloudSaveScreen({
       label: 'Use Online Save',
       detail: syncingOnlineSave ? 'Checking online save...' : formatIwt2SaveSummary(onlineSave),
       value: onlineSave ? 'Download' : 'Empty',
-      disabled: syncingOnlineSave || !onlineSave,
+      disabled: syncingOnlineSave || !onlineBackupsAvailable || !onlineSave,
-      onConfirm: useOnlineSave,
+      onConfirm: handleUseOnlineSave,
-    },
-    {
-      key: 'new-save',
-      label: 'Use New Save File',
-      detail: 'Start over with a fresh IWT2 character. Online save is not overwritten until you choose local save.',
-      value: 'New',
-      onConfirm: useNewSave,
     },
   ], onBack), [
+    handleUseLocalSave,
+    handleUseOnlineSave,
     onlineBackupsAvailable,
     onlineSave,
     onBack,
     save,
     syncingOnlineSave,
-    useLocalSave,
-    useNewSave,
-    useOnlineSave,
   ])
 
   return (
-    <Iwt2ScreenShell title="Backup Slot" onBack={onBack}>
+    <Iwt2ScreenShell title="Cloud Backup" onBack={onBack}>
-      {message && <p className="iwt2-screen-note">{message}</p>}
+      {statusMessage && <p className="iwt2-screen-note">{statusMessage}</p>}
       <Iwt2ActionList actions={actions} />
     </Iwt2ScreenShell>
   )
@@ -2023,16 +1999,22 @@ export function Iwt2GearUpgradeScreen({
   const selectedSlot = classProgress.slots[selectedSlotId]
   const selectedRecipe = IWT2_GEAR_SLOT_RECIPES[selectedClassId][selectedSlotId]
   const selectedBonus = gearBonusSummary(selectedRecipe.statId, selectedSlot.level, selectedClassId)
-  const nextLevel = Math.min(5, selectedSlot.level + 1)
+  const nextLevel = Math.min(IWT2_MAX_GEAR_LEVEL, selectedSlot.level + 1)
   const nextBonus = gearBonusSummary(selectedRecipe.statId, nextLevel, selectedClassId)
   const selectedClassName = gearClassDisplayName(selectedClassId, save)
   const upgradeCosts = iwt2GearUpgradeCosts(selectedClassId, selectedSlotId, selectedSlot.level)
-  const canUpgrade = selectedSlot.level < 5 && canAffordIwt2Costs(save, upgradeCosts)
+  const canUpgrade = selectedSlot.level < IWT2_MAX_GEAR_LEVEL && canAffordIwt2Costs(save, upgradeCosts)
   const infusionUnlocked = isIwt2InfusionUnlocked(classProgress)
-  const infusionAnchorSlot = selectedSlot.level >= 5
+  const passiveInfusionUnlocked = isIwt2PassiveInfusionUnlocked(save.gearProgress)
+  const infusionAnchorSlot = selectedSlot.level >= IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL
     ? selectedSlotId
-    : IWT2_GEAR_SLOTS.find((slotId) => classProgress.slots[slotId].level >= 5) ?? selectedSlotId
+    : IWT2_GEAR_SLOTS.find((slotId) => classProgress.slots[slotId].level >= IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL) ?? selectedSlotId
   const infusionAbilities = iwt2InfusionAbilitiesForClass(selectedClassId)
+  const passiveInfusionChoices = useMemo<Array<Iwt2RoguelikeChoice<Iwt2PassiveInfusionId>>>(() => {
+    if (selectedClassId !== 'healer') return []
+    return buildIwt2SelfBuffChoices(abilitiesForHealer(save.character.healerStyle))
+      .filter((choice): choice is Iwt2RoguelikeChoice<Iwt2PassiveInfusionId> => choice.id !== IWT2_REVIVE_PARTY_CHOICE.id)
+  }, [save.character.healerStyle, selectedClassId])
   const navEntries = useMemo<Iwt2GearNavEntry[]>(() => {
     const entries: Iwt2GearNavEntry[] = [{ kind: 'back', key: 'back', row: 0, column: 0 }]
     IWT2_PARTY_ORDER.forEach((classId, index) => {
@@ -2054,8 +2036,19 @@ export function Iwt2GearUpgradeScreen({
         disabled: selected || !infusionUnlocked || !canAffordIwt2Costs(save, costs),
       })
     })
+    passiveInfusionChoices.forEach((choice, index) => {
+      const selected = classProgress.passiveInfusionId === choice.id
+      entries.push({
+        kind: 'passiveInfusion',
+        key: `passive:${choice.id}`,
+        row: infusionAbilities.length + index + 1,
+        column: 2,
+        passiveId: choice.id,
+        disabled: selected || !passiveInfusionUnlocked,
+      })
+    })
     return entries
-  }, [canUpgrade, classProgress.infusionAbilityId, infusionAbilities, infusionAnchorSlot, infusionUnlocked, save, selectedClassId])
+  }, [canUpgrade, classProgress.infusionAbilityId, classProgress.passiveInfusionId, infusionAbilities, infusionAnchorSlot, infusionUnlocked, passiveInfusionChoices, passiveInfusionUnlocked, save, selectedClassId])
 
   const activeEntry = navEntries[Math.min(selectedIndex, navEntries.length - 1)] ?? navEntries[0]
 
@@ -2107,6 +2100,18 @@ export function Iwt2GearUpgradeScreen({
       } catch (error) {
         setMessage(error instanceof Error ? error.message : 'Infusion failed.')
       }
+      return
+    }
+    if (entry.kind === 'passiveInfusion') {
+      if (entry.disabled) return
+      try {
+        const nextSave = setIwt2PassiveInfusion(save, entry.passiveId)
+        onSaveUpdated(nextSave)
+        const passiveName = passiveInfusionChoices.find((choice) => choice.id === entry.passiveId)?.name ?? 'Passive'
+        setMessage(`${passiveName} set as passive infusion.`)
+      } catch (error) {
+        setMessage(error instanceof Error ? error.message : 'Passive infusion failed.')
+      }
     }
   }
 
@@ -2114,12 +2119,23 @@ export function Iwt2GearUpgradeScreen({
     <section className="content-screen iwt2-screen-shell iwt2-gear-screen" data-game-nav-active="true">
       <div className="iwt2-gear-layout">
         <section className="iwt2-gear-column">
+          <button
+            className={`back-button iwt2-gear-back ${activeEntry?.kind === 'back' ? 'game-selected' : ''}`}
+            data-controller-nav="skip"
+            data-game-selected={activeEntry?.kind === 'back' ? 'true' : undefined}
+            onClick={onBack}
+            onPointerDown={() => selectGearEntry(navEntries, setSelectedIndex, 'back')}
+            type="button"
+          >
+            Back
+          </button>
           <div className="iwt2-gear-class-list">
             {IWT2_PARTY_ORDER.map((classId) => {
               const metadata = IWT2_CLASS_METADATA[classId]
               const selected = selectedClassId === classId
               const focused = activeEntry?.kind === 'class' && activeEntry.classId === classId
               const classInfusion = save.gearProgress[classId].infusionAbilityId
+              const passiveInfusion = classId === 'healer' ? save.gearProgress.healer.passiveInfusionId : null
               const highest = Math.max(...IWT2_GEAR_SLOTS.map((slotId) => save.gearProgress[classId].slots[slotId].level))
               const className = gearClassDisplayName(classId, save)
               const classSubtitle = gearClassSubtitle(classId, save)
@@ -2137,7 +2153,7 @@ export function Iwt2GearUpgradeScreen({
                   <div>
                     <strong>{className}</strong>
                     <small>{classSubtitle}</small>
-                    <small>Top +{highest}{classInfusion ? ' | Slot 6 set' : ''}</small>
+                    <small>Top +{highest}{classInfusion ? ' | Active set' : ''}{passiveInfusion ? ' | Passive set' : ''}</small>
                   </div>
                 </button>
               )
@@ -2180,7 +2196,7 @@ export function Iwt2GearUpgradeScreen({
             onPointerDown={() => selectGearEntry(navEntries, setSelectedIndex, 'upgrade')}
             type="button"
           >
-            Upgrade to +{Math.min(5, selectedSlot.level + 1)}
+            Upgrade to +{Math.min(IWT2_MAX_GEAR_LEVEL, selectedSlot.level + 1)}
           </button>
         </section>
 
@@ -2196,8 +2212,8 @@ export function Iwt2GearUpgradeScreen({
                 <small>{selectedBonus.text}</small>
               </span>
               <span>
-                <strong>{selectedSlot.level >= 5 ? 'Max rank' : `Upgrade preview +${selectedSlot.level} -> +${nextLevel}`}</strong>
+                <strong>{selectedSlot.level >= IWT2_MAX_GEAR_LEVEL ? 'Max rank' : `Upgrade preview +${selectedSlot.level} -> +${nextLevel}`}</strong>
-                <small>{selectedSlot.level >= 5 ? infusionAnchorText(classProgress.slots[selectedSlotId].level) : `${selectedBonus.label}: ${selectedBonus.value} -> ${nextBonus.value}`}</small>
+                <small>{selectedSlot.level >= IWT2_MAX_GEAR_LEVEL ? infusionAnchorText(classProgress.slots[selectedSlotId].level) : `${selectedBonus.label}: ${selectedBonus.value} -> ${nextBonus.value}`}</small>
               </span>
             </div>
             <div className="iwt2-gear-cost-list">
@@ -2235,12 +2251,40 @@ export function Iwt2GearUpgradeScreen({
                   <div>
                     <strong>{ability.name}</strong>
                     <small>{ability.description}</small>
-                    <small>{selected ? 'Selected' : infusionUnlocked ? infusionCostText(save, costs) : 'Unlock: any slot to +5'}</small>
+                    <small>{selected ? 'Selected' : infusionUnlocked ? infusionCostText(save, costs) : `Unlock: any ${selectedClassName} slot to +${IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL}`}</small>
                   </div>
                 </button>
               )
             })}
           </div>
+          {selectedClassId === 'healer' && (
+            <div className="iwt2-infusion-list">
+              {passiveInfusionChoices.map((choice) => {
+                const selected = classProgress.passiveInfusionId === choice.id
+                const focused = activeEntry?.kind === 'passiveInfusion' && activeEntry.passiveId === choice.id
+                const disabled = selected || !passiveInfusionUnlocked
+                return (
+                  <button
+                    className={`iwt2-infusion-row ${selected ? 'active' : ''} ${focused ? 'game-selected' : ''}`}
+                    data-controller-nav="skip"
+                    data-game-selected={focused ? 'true' : undefined}
+                    disabled={disabled}
+                    key={choice.id}
+                    onClick={() => activateEntry({ kind: 'passiveInfusion', key: `passive:${choice.id}`, row: 0, column: 2, passiveId: choice.id, disabled })}
+                    onPointerDown={() => selectGearEntry(navEntries, setSelectedIndex, `passive:${choice.id}`)}
+                    type="button"
+                  >
+                    <span>P</span>
+                    <div>
+                      <strong>{choice.name}</strong>
+                      <small>{choice.description}</small>
+                      <small>{selected ? 'Selected passive' : passiveInfusionUnlocked ? 'Passive infusion' : `Unlock: any gear slot to +${IWT2_MAX_GEAR_LEVEL}`}</small>
+                    </div>
+                  </button>
+                )
+              })}
+            </div>
+          )}
           <footer className="iwt2-gear-message">{message}</footer>
         </section>
       </div>
@@ -2284,7 +2328,9 @@ function gearBonus(label: string, value: string): { label: string, text: string,
 }
 
 function infusionAnchorText(level: number): string {
-  return level >= 5 ? 'Infusion anchor available.' : 'No further bonus.'
+  if (level >= IWT2_MAX_GEAR_LEVEL) return 'Active and passive infusion anchors available.'
+  if (level >= IWT2_ACTIVE_INFUSION_MIN_GEAR_LEVEL) return 'Active infusion anchor available.'
+  return 'No infusion anchor.'
 }
 
 function formatPercent(value: number): string {
@@ -2372,6 +2418,39 @@ function activeUpgradeEntry(entries: Iwt2UpgradeNavEntry[], index: number) {
   return entries[Math.min(index, entries.length - 1)]
 }
 
+function moveHunterProfileSelection(
+  entries: Iwt2HunterProfileNavEntry[],
+  current: number,
+  action: InputAction,
+) {
+  if (!action.startsWith('navigate') || entries.length === 0) return current
+  const bounded = Math.min(current, entries.length - 1)
+  const active = entries[bounded]
+  if (!active) return 0
+  const candidates = entries
+    .map((entry, index) => ({ entry, index }))
+    .filter(({ index }) => index !== bounded)
+    .filter(({ entry }) => {
+      if (action === 'navigateLeft') return entry.column < active.column
+      if (action === 'navigateRight') return entry.column > active.column
+      if (action === 'navigateUp') return entry.row < active.row
+      return entry.row > active.row
+    })
+  if (candidates.length === 0) return bounded
+  candidates.sort((a, b) => {
+    const aPrimary = Math.abs(a.entry.row - active.row) + Math.abs(a.entry.column - active.column)
+    const bPrimary = Math.abs(b.entry.row - active.row) + Math.abs(b.entry.column - active.column)
+    const aSecondary = action === 'navigateLeft' || action === 'navigateRight'
+      ? Math.abs(a.entry.row - active.row)
+      : Math.abs(a.entry.column - active.column)
+    const bSecondary = action === 'navigateLeft' || action === 'navigateRight'
+      ? Math.abs(b.entry.row - active.row)
+      : Math.abs(b.entry.column - active.column)
+    return aPrimary - bPrimary || aSecondary - bSecondary || a.index - b.index
+  })
+  return candidates[0]?.index ?? bounded
+}
+
 function upgradeEntryDisabled(entry: Iwt2UpgradeNavEntry) {
   return entry.kind === 'upgradeContinue' && Boolean(entry.disabled)
 }

src/modes/iwt2/sim/arena.ts

@@ -9,6 +9,7 @@ import type {
   Iwt2EntityId,
   Iwt2GroundHazardState,
   Iwt2HostileAddState,
+  Iwt2ArenaBounds,
   Iwt2PartyAiRole,
   Iwt2PartyEntityId,
   Iwt2PartyEntityState,
@@ -66,14 +67,15 @@ export function createInitialIwt2ArenaState(
   bossHealthScale = 1,
   partyDamageTakenScale = 1,
   roguelikePressure?: Iwt2RoguelikePressureState,
+  bounds: Iwt2ArenaBounds = { width: DEFAULT_ARENA_WIDTH, height: DEFAULT_ARENA_HEIGHT },
 ): Iwt2ArenaState {
-  const initialBossIds = bossIds?.length ? bossIds.slice(0, 2) : chooseInitialBossIds(bossId)
+  const initialBossIds = bossIds?.length ? [...bossIds] : chooseInitialBossIds(bossId)
-  const bosses = initialBossIds.map((id, index) => createBossEntity(id, index, bossHealthScale))
+  const bosses = initialBossIds.map((id, index) => createBossEntity(id, index, initialBossIds.length, bossHealthScale, bounds))
   return {
     schemaVersion: 1,
     time: 0,
-    bounds: { width: DEFAULT_ARENA_WIDTH, height: DEFAULT_ARENA_HEIGHT },
+    bounds,
-    party: INITIAL_PARTY.map((member) => createPartyMember(member, partyDamageTakenScale)),
+    party: INITIAL_PARTY.map((member) => createPartyMember(member, partyDamageTakenScale, bounds)),
     projectiles: [],
     hostileAdds: [],
     hazards: [],
@@ -95,9 +97,15 @@ function chooseInitialBossIds(primaryBossId: Iwt2BossId): Iwt2BossId[] {
   return [primaryBossId, random]
 }
 
-function createBossEntity(bossId: Iwt2BossId, index: number, healthScale: number): Iwt2BossEntityState {
+function createBossEntity(
+  bossId: Iwt2BossId,
+  index: number,
+  bossCount: number,
+  healthScale: number,
+  bounds: Iwt2ArenaBounds,
+): Iwt2BossEntityState {
   const bossMetadata = IWT2_BOSS_METADATA[bossId]
-  const position = initialBossPosition(index)
+  const position = scaleArenaPoint(initialBossPosition(index, bossCount), bounds)
   const maxHealth = Math.max(1, Math.round(bossMetadata.maxHealth * Math.max(0.01, healthScale)))
   return {
     id: bossId,
@@ -123,9 +131,9 @@ function createBossEntity(bossId: Iwt2BossId, index: number, healthScale: number
     chargeHitEntityIds: [],
     slamApplied: false,
     wallContactSeconds: 0,
-    relocateTarget: { x: DEFAULT_ARENA_WIDTH * 0.58, y: DEFAULT_ARENA_HEIGHT * 0.5 + (index === 0 ? -64 : 64) },
+    relocateTarget: scaleArenaPoint({ x: DEFAULT_ARENA_WIDTH * 0.58, y: DEFAULT_ARENA_HEIGHT * 0.5 + (index === 0 ? -64 : 64) }, bounds),
     fireballCooldownRemaining: initialBossSecondaryCooldown(bossId) + index * 0.7,
-    fireballTarget: { x: 320, y: 250 },
+    fireballTarget: scaleArenaPoint({ x: 320, y: 250 }, bounds),
     birdWaveThresholdsTriggered: [],
     mechanicLanes: [],
     mechanicCircles: [],
@@ -134,13 +142,27 @@ function createBossEntity(bossId: Iwt2BossId, index: number, healthScale: number
   }
 }
 
-function initialBossPosition(index: number) {
+function initialBossPosition(index: number, bossCount = 2) {
+  if (bossCount > 2) {
+    const angle = -Math.PI * 0.5 + (Math.PI * (index + 0.5)) / bossCount
+    return {
+      x: 690 + Math.cos(angle) * 120,
+      y: DEFAULT_ARENA_HEIGHT * 0.5 + Math.sin(angle) * 165,
+    }
+  }
   return {
     x: index === 0 ? 660 : 760,
     y: index === 0 ? 190 : 345,
   }
 }
 
+function scaleArenaPoint(point: Iwt2Vec2, bounds: Iwt2ArenaBounds): Iwt2Vec2 {
+  return {
+    x: point.x * bounds.width / DEFAULT_ARENA_WIDTH,
+    y: point.y * bounds.height / DEFAULT_ARENA_HEIGHT,
+  }
+}
+
 function initialBossSpecialCooldown(bossId: Iwt2BossId): number {
   if (bossId === 'bulldrome') return 2
   if (bossId === 'great-jaggi') return 2.4
@@ -175,7 +197,7 @@ function initialBossSecondaryCooldown(bossId: Iwt2BossId): number {
 
 export function tickIwt2Arena(state: Iwt2ArenaState, input: Iwt2ArenaInput, dt: number): Iwt2ArenaState {
   const step = Math.max(0, Math.min(dt, MAX_DT))
-  if (step <= 0) return { ...state, events: [...state.events] }
+  if (step <= 0) return state
 
   const inputMove = {
     x: clampInputAxis(input.moveX),
@@ -261,10 +283,18 @@ export function tickIwt2Arena(state: Iwt2ArenaState, input: Iwt2ArenaInput, dt:
     nextAddId: bossResult.nextAddId ?? state.nextAddId,
     nextHazardId: projectileResult.nextHazardId,
     nextEventId: state.nextEventId + nextEvents.length,
-    events: [...state.events, ...nextEvents].slice(-MAX_EVENTS),
+    events: appendEventHistory(state.events, nextEvents),
   }
 }
 
+function appendEventHistory(previous: Iwt2ArenaEvent[], next: Iwt2ArenaEvent[]): Iwt2ArenaEvent[] {
+  if (next.length === 0) return previous
+  const overflow = Math.max(0, previous.length + next.length - MAX_EVENTS)
+  return overflow > 0
+    ? [...previous.slice(overflow), ...next]
+    : [...previous, ...next]
+}
+
 function tickPartyHotEffects(
   party: Iwt2PartyEntityState[],
   dt: number,
@@ -324,7 +354,7 @@ function regeneratePartyMana(party: Iwt2PartyEntityState[], dt: number): Iwt2Par
   })
 }
 
-function createPartyMember(initial: InitialPartyMember, damageTakenScale: number): Iwt2PartyEntityState {
+function createPartyMember(initial: InitialPartyMember, damageTakenScale: number, bounds: Iwt2ArenaBounds): Iwt2PartyEntityState {
   const metadata = IWT2_CLASS_METADATA[initial.classId]
   const safeDamageTakenScale = Number.isFinite(damageTakenScale) ? Math.max(0.01, damageTakenScale) : 1
   return {
@@ -332,7 +362,7 @@ function createPartyMember(initial: InitialPartyMember, damageTakenScale: number
     kind: 'party',
     classId: initial.classId,
     aiRole: initial.aiRole,
-    position: { x: initial.x, y: initial.y },
+    position: scaleArenaPoint({ x: initial.x, y: initial.y }, bounds),
     velocity: { x: 0, y: 0 },
     facing: { x: 1, y: 0 },
     radius: metadata.radius,
@@ -355,7 +385,7 @@ function createPartyMember(initial: InitialPartyMember, damageTakenScale: number
     attackReady: false,
     status: createEmptyStatus(),
     hotEffects: [],
-    preferredOffset: { ...initial.preferredOffset },
+    preferredOffset: scaleArenaPoint(initial.preferredOffset, bounds),
     decisionSecondsRemaining: initial.decisionOffset,
   }
 }
@@ -748,6 +778,7 @@ function advanceBossProjectile({
       radius: hitMember.radius + projectile.radius,
     }, {
       damage: projectile.damage,
+      damageEventType: 'bossProjectileHit',
       sourceId: projectile.sourceId,
       time,
     })
@@ -765,13 +796,13 @@ function advanceBossProjectile({
     bounced = true
   }
 
-  if (bounced) {
+  if (hitMember) {
     const puddle = addFirePuddle({
       damage: IWT2_BOSS_METADATA['yian-kut-ku'].firePuddleDamage!,
       duration: IWT2_BOSS_METADATA['yian-kut-ku'].firePuddleSeconds!,
       hazards: nextHazards,
       nextHazardId: nextHazardIdValue,
-      position: hitMember?.position ?? position,
+      position: hitMember.position,
       radius: IWT2_BOSS_METADATA['yian-kut-ku'].firePuddleRadius!,
       sourceId: projectile.sourceId,
       time,

src/modes/iwt2/sim/arenaState.ts

@@ -1,59 +1,16 @@
-import { IWT2_BOSS_METADATA, type Iwt2BossId } from '../content/bosses'
+import type { Iwt2BossId } from '../content/bosses'
-import { IWT2_CLASS_METADATA } from '../content/classes'
 import {
   createInitialIwt2ArenaState as createCoreIwt2ArenaState,
   tickIwt2Arena as tickCoreIwt2Arena,
 } from './arena'
 import type {
-  Iwt2ArenaIndicator,
   Iwt2ArenaInput,
+  Iwt2ArenaBounds,
   Iwt2ArenaState as Iwt2CoreArenaState,
-  Iwt2BossEntityState,
-  Iwt2HostileAddState,
-  Iwt2PartyEntityState,
   Iwt2RoguelikePressureState,
 } from './types'
 
-export type Iwt2ArenaEntityKind = 'player' | 'party' | 'boss' | 'projectile' | 'hostileAdd'
+export type Iwt2ArenaState = Iwt2CoreArenaState
-
-export type Iwt2ArenaEntity = {
-  id: string
-  kind: Iwt2ArenaEntityKind
-  icon: string
-  color: string
-  x: number
-  y: number
-  radius: number
-  health: number
-  maxHealth: number
-  stunnedFor: number
-}
-
-export type Iwt2ArenaTelegraph =
-  | {
-    kind: 'charge'
-    x: number
-    y: number
-    width: number
-    height: number
-    active: boolean
-  }
-  | {
-    kind: 'slam'
-    x: number
-    y: number
-    radius: number
-    active: boolean
-  }
-
-export type Iwt2ArenaState = Iwt2CoreArenaState & {
-  arena: {
-    width: number
-    height: number
-  }
-  entities: Iwt2ArenaEntity[]
-  telegraphs: Iwt2ArenaTelegraph[]
-}
 
 export function createInitialIwt2ArenaState(
   bossId?: Iwt2BossId,
@@ -61,95 +18,11 @@ export function createInitialIwt2ArenaState(
   bossHealthScale?: number,
   partyDamageTakenScale?: number,
   roguelikePressure?: Iwt2RoguelikePressureState,
+  bounds?: Iwt2ArenaBounds,
 ): Iwt2ArenaState {
-  return decorateArenaState(createCoreIwt2ArenaState(bossId, bossIds, bossHealthScale, partyDamageTakenScale, roguelikePressure))
+  return createCoreIwt2ArenaState(bossId, bossIds, bossHealthScale, partyDamageTakenScale, roguelikePressure, bounds)
 }
 
 export function tickIwt2Arena(state: Iwt2ArenaState, input: Iwt2ArenaInput, dt: number): Iwt2ArenaState {
-  return decorateArenaState(tickCoreIwt2Arena(state, input, dt))
+  return tickCoreIwt2Arena(state, input, dt)
-}
-
-export function decorateArenaState(state: Iwt2CoreArenaState): Iwt2ArenaState {
-  return {
-    ...state,
-    arena: { ...state.bounds },
-    entities: [
-      ...state.party.map(toArenaEntity),
-      ...state.hostileAdds.map(toHostileAddArenaEntity),
-      ...state.bosses.map(toBossArenaEntity),
-    ],
-    telegraphs: createTelegraphs(state.indicators),
-  }
-}
-
-function toHostileAddArenaEntity(add: Iwt2HostileAddState): Iwt2ArenaEntity {
-  return {
-    id: add.id,
-    kind: 'hostileAdd',
-    icon: 'v',
-    color: '#f0b84f',
-    x: add.position.x,
-    y: add.position.y,
-    radius: add.radius,
-    health: add.health,
-    maxHealth: add.maxHealth,
-    stunnedFor: 0,
-  }
-}
-
-function toArenaEntity(member: Iwt2PartyEntityState): Iwt2ArenaEntity {
-  const metadata = IWT2_CLASS_METADATA[member.classId]
-  return {
-    id: member.id,
-    kind: member.aiRole === 'player' ? 'player' : 'party',
-    icon: metadata.icon,
-    color: metadata.color,
-    x: member.position.x,
-    y: member.position.y,
-    radius: member.radius,
-    health: member.health,
-    maxHealth: member.maxHealth,
-    stunnedFor: Math.max(member.status.stunnedSeconds, member.status.knockedDownSeconds),
-  }
-}
-
-function toBossArenaEntity(boss: Iwt2BossEntityState): Iwt2ArenaEntity {
-  const metadata = IWT2_BOSS_METADATA[boss.bossId]
-  return {
-    id: boss.id,
-    kind: 'boss',
-    icon: metadata.icon,
-    color: metadata.color,
-    x: boss.position.x,
-    y: boss.position.y,
-    radius: boss.radius,
-    health: boss.health,
-    maxHealth: boss.maxHealth,
-    stunnedFor: 0,
-  }
-}
-
-function createTelegraphs(indicators: Iwt2ArenaIndicator[]): Iwt2ArenaTelegraph[] {
-  return indicators.flatMap((indicator): Iwt2ArenaTelegraph[] => {
-    if (indicator.kind === 'lane') {
-      return [{
-        active: indicator.phase === 'active',
-        height: indicator.width * 2,
-        kind: 'charge' as const,
-        width: Math.max(16, Math.hypot(indicator.end.x - indicator.start.x, indicator.end.y - indicator.start.y)),
-        x: Math.min(indicator.start.x, indicator.end.x),
-        y: Math.min(indicator.start.y, indicator.end.y) - indicator.width,
-      }]
-    }
-    if (indicator.kind === 'circle') {
-      return [{
-        active: indicator.phase === 'active',
-        kind: 'slam' as const,
-        radius: indicator.radius,
-        x: indicator.position.x,
-        y: indicator.position.y,
-      }]
-    }
-    return []
-  })
 }

src/modes/iwt2/sim/hazards.ts

@@ -224,6 +224,7 @@ export function tickGroundHazards({
           },
           {
             damage: hazard.damage,
+            damageEventType: 'groundHazardTick',
             sourceId: hazard.sourceId,
             time,
           },

src/modes/iwt2/sim/roguelikePressure.ts

@@ -12,9 +12,11 @@ const ROGUELIKE_PRESSURE_INITIAL_STAGE_DAMAGE = 2
 const ROGUELIKE_PRESSURE_SOURCE_ID = 'roguelike-pressure'
 
 export function roguelikeIncomingDamageScale(
-  _stage: number,
+  stage: number,
-  _contentType: Iwt2RoguelikePressureContentType,
+  contentType: Iwt2RoguelikePressureContentType,
 ): number {
+  void stage
+  void contentType
   return 1
 }
 

src/modes/iwt2/sim/types.ts

@@ -288,6 +288,8 @@ export type Iwt2ArenaEventType =
   | 'partyAttack'
   | 'partyHealed'
   | 'partyDamaged'
+  | 'bossProjectileHit'
+  | 'groundHazardTick'
   | 'partyStunned'
   | 'bossChargeStart'
   | 'bossChargeHit'

src/modes/iwt2/sim/yianKutKuAi.ts

@@ -46,7 +46,7 @@ const BIRD_COUNT = 3
 const BIRD_MELEE_RANGE = 24
 const BIRD_MELEE_COOLDOWN = 1.15
 const BIRD_FLIGHT_DAMAGE = 26
-const YIAN_FIREBALL_BOUNCES = 8
+const YIAN_FIREBALL_BOUNCES = 3
 const YIAN_SAFE_WALL_MARGIN = 118
 const YIAN_CENTER_CAST_DISTANCE = 36
 const YIAN_CENTER_CHARGE_SPEED = 430