Android build v1.1.34

android/app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.warren.iwanttoheal"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 114
+        versionCode 115
-        versionName "1.1.33"
+        versionName "1.1.34"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
              // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.

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

@@ -0,0 +1,692 @@
+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 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 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'),
+  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,
+  gearLevel,
+  maxSeconds,
+  repeats,
+  requiredBosses,
+  stages,
+  top,
+  workers,
+}) {
+  const safeWorkers = Math.max(1, Math.floor(workers))
+  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 summary = summarizeResults(results)
+  console.log(JSON.stringify({
+    config: {
+      bossCount,
+      bossDamagePercent,
+      bossHpPercent,
+      bosses: bossFilter,
+      classes,
+      gearLevel,
+      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
+  --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
+`)
+}
+
+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 +1,567 @@
+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; }
+    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 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 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");
+    });
+
+    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);
+      });
+      container.addEventListener("change", () => {
+        master.checked = [...container.querySelectorAll("input")].every(input => input.checked);
+      });
+    }
+
+    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(" ");
+    }
+
+    run.addEventListener("click", async () => {
+      const options = payload();
+      raw.textContent = "$ " + commandFor(options) + "\\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...";
+      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('Worst fail rate', worst ? percent(failRate(worst)) : 'n/a'),
+          metric('Worst combo', worst ? escapeHtml(worst.key) : '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/modes/iwt2/IWantToHeal2App.tsx

@@ -49,6 +49,11 @@ import {
 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,
@@ -613,11 +618,27 @@ function createRoguelikeBossPair(
     : contentType === 'stadium'
       ? IWT2_PVP_STADIUM_WEIGHTED_BOSS_PROGRESSION_ENABLED
       : IWT2_PVP_ROGUELIKE_WEIGHTED_BOSS_PROGRESSION_ENABLED
+  const bossPool = roguelikeBossPoolFor(variant, contentType)
 
   if (weightedProgressionEnabled) {
-    return createIwt2WeightedRoguelikeBossPair(stage)
+    return createIwt2WeightedRoguelikeBossPair(stage, Math.random, { bossPool })
   }
-  return createUniformIwt2RoguelikeBossPair()
+  return createUniformIwt2RoguelikeBossPair(Math.random, { bossPool })
+}
+
+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[] {

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/pvpGearNormalization.ts

@@ -10,9 +10,11 @@ export type Iwt2PvpGearNormalizationConfig = {
   gearLevel: Iwt2GearLevel
 }
 
+export const IWT2_PVP_NORMALIZED_GEAR_LEVEL: Iwt2GearLevel = 5
+
 export const IWT2_PVP_GEAR_NORMALIZATION: Iwt2PvpGearNormalizationConfig = {
   enabled: true,
-  gearLevel: 5,
+  gearLevel: IWT2_PVP_NORMALIZED_GEAR_LEVEL,
 }
 
 export function createIwt2PvpNormalizedGearProgress(

src/modes/iwt2/content/roguelikeBossProgression.ts

@@ -3,6 +3,12 @@ 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'
 
@@ -11,6 +17,10 @@ type TierWeight = {
   weight: number
 }
 
+type Iwt2RoguelikeBossPoolOptions = {
+  bossPool?: readonly Iwt2BossId[]
+}
+
 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'],
@@ -52,23 +62,28 @@ export function createIwt2PveRoguelikeBossPair(
 export function createIwt2WeightedRoguelikeBossPair(
   stage: number,
   random: () => number = Math.random,
+  options: Iwt2RoguelikeBossPoolOptions = {},
 ): Iwt2BossId[] {
   const choices: Iwt2BossId[] = []
   const maxThreat = maxThreatForStage(stage)
+  const bossPool = normalizeBossPool(options.bossPool)
 
   while (choices.length < 2) {
-    const next = chooseWeightedBossForStage(stage, choices, maxThreat, random)
+    const next = chooseWeightedBossForStage(stage, choices, maxThreat, random, bossPool)
     if (!next) break
     choices.push(next)
   }
 
   return choices.length === 2
     ? choices
-    : createUniformIwt2RoguelikeBossPair(random)
+    : createUniformIwt2RoguelikeBossPair(random, { bossPool })
 }
 
-export function createUniformIwt2RoguelikeBossPair(random: () => number = Math.random): Iwt2BossId[] {
+export function createUniformIwt2RoguelikeBossPair(
-  const pool = Object.keys(IWT2_BOSS_METADATA) as Iwt2BossId[]
+  random: () => number = Math.random,
+  options: Iwt2RoguelikeBossPoolOptions = {},
+): Iwt2BossId[] {
+  const pool = normalizeBossPool(options.bossPool)
   const choices: Iwt2BossId[] = []
   while (pool.length > 0 && choices.length < 2) {
     const index = randomIndex(pool.length, random)
@@ -78,19 +93,29 @@ export function createUniformIwt2RoguelikeBossPair(random: () => number = Math.r
   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) => (
-        !selectedSet.has(bossId) && selectedThreat + threatForBoss(bossId) <= maxThreat
+        bossPoolSet.has(bossId)
+        && !selectedSet.has(bossId)
+        && selectedThreat + threatForBoss(bossId) <= maxThreat
       )),
     }))
     .filter((entry) => entry.weight > 0 && entry.bosses.length > 0)
@@ -110,6 +135,21 @@ function chooseWeightedBossForStage(
   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) {

src/modes/iwt2/screens/BossArenaScreen.tsx

@@ -52,16 +52,17 @@ 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
@@ -278,12 +279,18 @@ 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])

src/modes/iwt2/sim/arena.ts

@@ -69,8 +69,8 @@ export function createInitialIwt2ArenaState(
   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, bounds))
+  const bosses = initialBossIds.map((id, index) => createBossEntity(id, index, initialBossIds.length, bossHealthScale, bounds))
   return {
     schemaVersion: 1,
     time: 0,
@@ -97,9 +97,15 @@ function chooseInitialBossIds(primaryBossId: Iwt2BossId): Iwt2BossId[] {
   return [primaryBossId, random]
 }
 
-function createBossEntity(bossId: Iwt2BossId, index: number, healthScale: number, bounds: Iwt2ArenaBounds): Iwt2BossEntityState {
+function createBossEntity(
+  bossId: Iwt2BossId,
+  index: number,
+  bossCount: number,
+  healthScale: number,
+  bounds: Iwt2ArenaBounds,
+): Iwt2BossEntityState {
   const bossMetadata = IWT2_BOSS_METADATA[bossId]
-  const position = scaleArenaPoint(initialBossPosition(index), bounds)
+  const position = scaleArenaPoint(initialBossPosition(index, bossCount), bounds)
   const maxHealth = Math.max(1, Math.round(bossMetadata.maxHealth * Math.max(0.01, healthScale)))
   return {
     id: bossId,
@@ -136,7 +142,14 @@ 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,
@@ -757,6 +770,7 @@ function advanceBossProjectile({
       radius: hitMember.radius + projectile.radius,
     }, {
       damage: projectile.damage,
+      damageEventType: 'bossProjectileHit',
       sourceId: projectile.sourceId,
       time,
     })
@@ -774,13 +788,13 @@ 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/hazards.ts

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

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