Everyone has a tier list. Here's a more useful question: which heroes multiply your entire army, not just themselves? This guide explains the principle of multiplicative passive stacking — and how to apply it regardless of which faction you're building.
Every hero has a passive skill that buffs something — troop DEF, troop HP, troop ATK, faction damage. Most players pick heroes by individual CP or tier list rankings. Those matter, but there's a more powerful lens to apply first.
Ask: what does this hero's passive do to my entire army? A hero with +30% faction DEF doesn't just make themselves tougher — they make every troop in your army tougher. Now pair that hero with one who gives +14.5% faction HP. Those two passives don't add together. They multiply. This is the principle of multiplicative passive stacking, and it applies to every faction in the game.
The Stacking Formula
One hero gives +30% DEF (your troops take less damage per hit). Another gives +14.5% HP (your troops survive more hits). Together: 1.30 × 1.145 = 1.49 — a 49% increase in effective survivability. That's nearly half again as tough as having neither. No single hero provides that kind of army-wide boost alone. This is the core principle: find your faction's multiplicative pair.
This principle applies to every faction. Fighters, Riders, and Shooters each have heroes with army-wide passives that stack. The specific heroes differ, but the math works the same way. Find the DEF booster and the HP booster for your chosen faction — then build around them.
The combat reports prove it. In the battle systems page, the Troop Buffs section shows "Heroes" as a single pooled percentage — CK's 246.1% vs Dinhthai's 132.8%. That's the combined effect of all hero passives stacking together. The 113% gap is where multiplicative hero selection creates real battlefield advantage.
Here's how this principle plays out in practice. CerealKiller runs a Fighter-faction army on S497. The multiplicative core:
Passive "Training Expert: Assaulter" boosts all Fighters' DEF by up to 30%. He's also the highest CP hero in the roster with balanced ATK/DEF — unusual for DPS. His "Rain Fire" active deals 2,668% at Lv.22. But the real value is that passive — it's working on every Fighter troop in every battle, silently.
Passive "Heart of Steel" boosts all Fighters' HP by 14.5%. Highest DEF in the roster at 21,153 — a natural wall. His "Fire Barrage" active still deals 1,719% damage. Exclusive Equipment "Siren's Blessing" adds Faction Counter +4.60%, yet another multiplicative layer. Tank that hits hard and makes your entire army harder to kill.
Together: Tristan's +30% DEF × Francis's +14.5% HP = 49% more effective survivability for every Fighter troop. And since 4 out of 5 heroes in the squad are Fighters, this passive stacking covers almost the entire army.
With the multiplicative core established, remaining slots fill specific roles. Each hero adds something the core pair doesn't cover.
Highest raw ATK in the roster. "Blade Storm" deals 2,586% at Lv.20. While Tristan and Francis make the army survive, Guy is the one dealing killing blows. Progression skill "Samurai's Gift" boosts idle food gains — rare dual combat + economy value. Equip with ATK gear.
Free via story progression. DEF 19,293 makes her the second-hardest wall after Francis. "Go Rex Go!" deals 2,000%+ damage despite being a tank. As a Fighter, she benefits directly from both Tristan's DEF passive and Francis's HP passive — the multiplicative core makes her tougher than her raw stats suggest.
The one non-Fighter. Covers the Shooter faction gap — when you face Fighter-heavy enemies, she's your counter. Also boosts construction speed passively. One Shooter in a Fighter squad gives faction flexibility without diluting passive stacking.
You've got 4 Fighters locked in: Tristan, Guy, Francis, Catherine & Rex. The faction bonus (3+ same = 15% ATK/DEF) is already active. A 5th Fighter doesn't increase it. So the 5th slot is purely about what that individual hero adds to the formation.
The instinct is to go all-Fighter — Farhad at 4★ fills the slot, benefits from Tristan and Francis passives, keeps the roster "clean." But instinct isn't math.
CP 1,574,800. As a Fighter, he benefits from Tristan's +30% DEF and Francis's +14.5% HP personally. His effective hero survivability:
1,574,800 × 1.30 × 1.145 ≈ 2,343,000 effective CP
Solid. But he brings no army-wide multiplier. His value is his own combat stats, buffed by faction passives. That's it.
CP 1,927,750 — 23% higher base than Farhad. She doesn't benefit from Tristan/Francis passives (she's Shooter), so her effective hero CP stays at 1,927,750 raw. But look at what Blood Rose brings to the table:
Blood Rose (Exclusive Weapon)
Troop DMG +4.60% · Troop HP +4.60% · Faction Counter +4.60%
At 4★ Exclusive Talent "High Morale": Hero ATK +10%, DEF +10%, Troop Capacity +5%
Those "Troop" bonuses don't say "Shooter Troop." They say Troop — meaning your entire Fighter army benefits. Every single Spec Ops Fighter hits 4.6% harder and survives 4.6% longer. Combined: 1.046 × 1.046 = 9.4% more effective power across your whole army.
With 18,000+ Spec Ops Fighters, a 9.4% army-wide multiplier is enormous. Let's compare what each hero actually contributes to total formation power:
| Factor | Farhad (5 Fighters) | Natasha + Blood Rose |
|---|---|---|
| Faction Bonus | 15% (3+ already met) | 15% (4 Fighters still qualifies) |
| Troop Passives | Unchanged — troops are Fighters | Unchanged — troops are Fighters |
| Hero Effective CP | ~2.34M (with passive boost) | ~1.93M (no passive boost) |
| Army-Wide Multiplier | None | +4.6% DMG, +4.6% HP, +4.6% Counter |
| Troop Capacity | Base | +5% at 4★ |
| Active Skill | A-tier ceiling | Crushing Kiss — 1,512% ATK |
| Future Optionality | None | Shooter passive ready for diversification |
Farhad's advantage is ~410K effective hero CP from faction passive buffs. Natasha's advantage is a 9.4% multiplicative boost to your entire army. When your army is 18,000+ troops, the army-wide multiplier wins by an order of magnitude.
The Verdict
Natasha + Blood Rose. The 5th slot isn't about faction purity — it's about what adds the most total formation power. An exclusive weapon with team-wide Troop DMG and Troop HP multiplies your entire Fighter army. Farhad only multiplies himself. And when you eventually diversify into Shooters post-WT30, Natasha's passive (Shooters' DEF +15%, Shooter ATK up to +35%, All Shooters' battle damage +10%) activates across your new troops for free. She's an investment that appreciates.
The principle at work again: You're not picking a hero. You're picking a multiplier. Farhad is a personal multiplier — he benefits from passives himself. Natasha is a team multiplier — she pushes Blood Rose's bonuses onto your entire army. The same logic that says "pick Tristan for his army-wide DEF passive" says "pick Natasha for her army-wide weapon bonuses." Individual stats matter less than systemic reach.
The Fighter example above is CerealKiller's application of this framework — not the only valid one. If you're building Riders or Shooters, the principle is identical. Every faction has its own multiplicative pair: a DEF booster and an HP booster whose passives compound army-wide. Every faction also has exclusive weapons that provide Troop DMG and Troop HP bonuses to your entire army. The game designs it this way deliberately (more on that in the Monetisation Design section below).
Here's how to find your faction's equivalent structure:
Find your faction's DEF booster. Open each hero's passive skills and look for "all [faction] DEF" bonuses. That hero is your Tristan-equivalent — the one who makes your entire army take less damage per hit. Build them first. For CK's Fighters, this was Tristan at +30% DEF.
Find your faction's HP booster. Look for "all [faction] HP" passives. That's your Francis-equivalent — they make your army survive more total hits. Together with the DEF booster, they form your multiplicative core. CK's was Francis at +14.5% HP. Together: 1.30 × 1.145 = 49% more effective survivability.
Fill remaining slots with faction heroes + one off-faction weapon carrier. You need 3+ same-faction heroes for the 15% faction ATK/DEF bonus. Beyond that, consider whether a 5th faction hero adds more than an off-faction hero carrying an exclusive weapon with team-wide Troop DMG and Troop HP (see the Natasha analysis above — the principle is the same for any faction's weapon carrier).
Check exclusive weapon stats carefully. Look for bonuses labelled "Troop DMG" and "Troop HP" — not "Fighter DMG" or "Shooter HP." The generic "Troop" label means the bonus applies to your entire army regardless of faction. These weapons are where off-faction heroes earn their slot.
If you're building Riders, your Tristan-equivalent is whichever Rider hero has an army-wide DEF passive. Your Francis-equivalent is the one with Rider HP. Your off-faction weapon carrier might be a Fighter or Shooter with a strong exclusive weapon — apply the same math CK used for the Farhad vs Natasha comparison above. The numbers will differ. The reasoning doesn't.
A quick way to evaluate your pair: Multiply the DEF passive by the HP passive (e.g., 1.30 × 1.145 = 1.49). CK considers anything above 1.35 (35%+ effective survivability) a strong multiplicative core. Below 1.20, it's worth checking whether your faction has a better option you haven't considered. Your threshold may differ depending on what other buff sources you have access to.
Recognise the Monetisation Design
This isn't a coincidence. Every faction has its own multiplicative pair and exclusive weapons because the game wants you to build all three. Three factions × hero fragments × exclusive weapons × research trees = triple the spending. It's elegant design — each faction's passives genuinely work, which makes the "balanced" approach feel rational even when it's the most expensive path.
For whales or high spenders with the luxury of going all-in on everything — knock yourself out, balanced works when money isn't the constraint. But for C2P players, the discipline is choosing one faction and staying there. Not just pre-WT30 — even after. The cost to build a second faction's hero passives, exclusive weapons, and research tree to competitive depth is effectively starting over. Your dollars compound deepest when they compound in one place.
The game tests whether you can resist the design that's specifically engineered to spread your spending thin. Same test as the countdown timer, the FOMO event, the sick dog. Different lever, same principle. Concentration is the counter.
Farhad (A-tier, CP 1,574,800) is solid. But at Lv.78 with full investment, he's at 1.57M CP. Guy at the same level is nearly double at 3.09M. That's not a skill gap — it's a ceiling gap baked into base stats.
Use A-tier heroes for gathering, APC slot filling, and faction coverage. But premium fragments always go to your multiplicative core and S-tier supports. The ceiling gap compounds over time — the earlier you concentrate, the further ahead you pull.
Once a hero reaches Hall of Honor (5-star), Honor Level unlocks global troop buffs for your entire army. Guy's Honor Level adds +100 ATK to all heroes and stacks Fighter ATK bonuses across tiers. This is another compound layer — concentrated investment unlocks buffs that amplify everything else you've built.
This system is invisible to new players. It's the reason a veteran with 3 maxed heroes outperforms someone with 8 half-built ones — honor buffs silently multiply every battle, on top of passive stacking.
Here's something most hero guides don't mention: in troop battles (PvP, rallies, world map), hero equipment is pooled into one number. The game sums all equipment across all your APC heroes and applies the total as a single buff. It doesn't matter which hero wears which piece — the troop damage is the same.
This means stop agonising over gear allocation for PvP. Instead, focus on total equipment quality across all heroes. The battle systems page shows the proof — CK's Hero Equipment contributes 122.3% as one pooled percentage.
In hero battles (Adventure/PvE), allocation does matter for normal attacks — ATK gear on Strikers, DEF gear on Tankers. But for the fights that decide wars, it's the total that counts.
Find your faction's DEF + HP passive pair. If you're following a concentration strategy, fragments and skill books go to these heroes first. This one decision shapes everything downstream.
Ryan, Shadow, Angela — star-up cost is enormous without heavy spending. For most C2P players, a 5-star core hero with army-wide passives outperforms a 1-star anything. If you're spending at whale level, the calculus changes — new-gen heroes may be worth pursuing directly.
Non-combat heroes earn value on gathering, construction, and research without needing fragments. Also: get unused heroes to Lv.40/4★ for their free global buff — it feeds the shared pool in hero battles.
In a multiplicative system, every fragment on a non-core hero is a fragment not deepening your multiplicative engine. The earlier you concentrate, the further the compounding advantage pulls ahead. This is especially true for C2P and F2P players — if you're a heavy spender, you may have the resources to invest more broadly.
Heavy spenders building all three factions. If money isn't the constraint, balanced hero investment across Fighters, Riders, and Shooters is viable. The multiplicative core principle still applies — you'd just build three separate cores instead of one.
Arena/Duel specialists. Competitive PvP formats reward counter-drafting. A single-faction hero roster is predictable. If Arena ranking is your primary goal, you'll need broader hero coverage than this guide recommends.
Late-server players joining established meta. If your server is deep into Season 4+ and multi-faction armies are the norm, concentrating on one faction's heroes may not give you the alliance utility your team needs. Adapt to your server's reality.
Players who value variety over optimisation. This framework optimises for power per resource spent. If you enjoy collecting and building diverse heroes because it's fun, that's a legitimate way to play — the math just won't compound as fast.