wos-joiner

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Identify best rally joiner heroes from user's roster. Use when user asks about joining rallies, garrison defense, or which hero to put first when joining. Explains expedition skill mechanics.

StrainReviews By StrainReviews schedule Updated 1/7/2026

name: wos-joiner description: Identify best rally joiner heroes from user's roster. Use when user asks about joining rallies, garrison defense, or which hero to put first when joining. Explains expedition skill mechanics. allowed-tools: Read, Glob

WoS Joiner Hero Analyzer

Purpose

Helps users understand rally joiner mechanics and identify their best joiner heroes.

Critical Mechanic

When joining a rally, only your LEFTMOST hero's TOP-RIGHT expedition skill is used!

  • Leftmost hero: The first hero in your march lineup (slot 1)
  • Top-right skill: The expedition skill in the top-right position on the hero skill screen
  • Your other 2 heroes contribute NOTHING to rally buffs
  • Only the top 4 highest SKILL LEVEL expedition skills from all joiners apply
  • This is based on skill level, not player power
  • Member skills CAN stack if they're the same effect

IMPORTANT: A high-level wrong skill can bump out a lower-level right skill. Example: A level 5 Sergey (defensive) would bump out a level 3 Jessie - even though Jessie's skill is far more valuable for attacks.

Best Attack/Rally Joiner Heroes

Heroes with top-right expedition skills that buff rally damage:

Hero Gen Skill (Top-Right) Effect per Level
Jessie 5 Stand of Arms +5/10/15/20/25% DMG dealt
Jeronimo 1 Infantry ATK buff Scales with level
Jasser 7 Rally damage buff Scales with level
Seo-yoon 8 Rally damage buff Scales with level

Why Jessie is top tier: Her "damage dealt" buff affects ALL damage types:

  • Normal attacks
  • Hero skills
  • Pet abilities
  • Teammate buffs

Best Garrison/Defense Joiner Heroes

Heroes with top-right expedition skills that reduce damage taken:

Hero Gen Skill (Top-Right) Effect per Level
Sergey 1 Defenders' Edge -4/8/12/16/20% DMG taken

When to Join with TROOPS ONLY (No Heroes)

If you don't have one of the attack joiner heroes above, join with troops only:

  • Don't put any heroes in the march
  • This prevents your leveled-up wrong skill from bumping out a valuable damage multiplier
  • Your troops still contribute to rally damage

Instructions

When analyzing joiner heroes:

  1. Check user's generation to see which joiner heroes are available
  2. For attack joining: Only use Jeronimo, Jessie, Jasser, or Seo-yoon
  3. For garrison joining: Sergey is the best option
  4. If they don't have these heroes: Recommend joining with troops only

Common Mistakes to Correct

Mistake 1: "I put my strongest heroes when joining"

Correction: Only the LEFTMOST hero's expedition skill matters. Put your best JOINER hero first (if you have one), not your strongest overall hero.

Mistake 2: "All my joiner heroes' skills apply"

Correction: Only 1 skill per joiner contributes. Your 2nd and 3rd heroes are just carrying troops.

Mistake 3: "I'll just use any hero when joining"

Correction: If your hero has a high-level skill that's wrong for the situation, it could bump out someone else's valuable skill. Better to join with troops only.

Investment Priority for Joiners

Joiner heroes should have:

  • ✅ HIGH top-right expedition skill level (this determines if your skill gets used AND how strong it is!)
    • Jessie: +5% per level (max +25% at level 5)
    • Sergey: -4% per level (max -20% at level 5)
  • ✅ Functional gear (legendary okay)
  • ✅ Appropriate hero levels
  • ❌ NOT mythic gear
  • ❌ NOT premium resources (Essence Stones, Mithril)
  • ❌ NOT priority over main heroes

Output Format

## Your Best Joiner Heroes

### For Attack Rallies (Bear Trap, Castle Attack):
1. **Jessie** - +25% DMG dealt (all troops)
   - Current Skill Level: 3/5
   - Recommendation: Upgrade to 5 for maximum rally contribution

### For Garrison Defense:
1. **Sergey** - -20% DMG taken (all troops)
   - Current Skill Level: 2/5
   - Recommendation: Upgrade for better defensive contribution

### If You Don't Have Jessie/Jeronimo/Jasser/Seo-yoon:
Join with TROOPS ONLY (no heroes) to avoid bumping out someone else's valuable damage skill.
Install via CLI
npx skills add https://github.com/StrainReviews/wos-optimizer --skill wos-joiner
Repository Details
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