2-Player Co-op Difficulty Scaling Explained

What Actually Scales

• 1
  HP multiplies well above 2x

  in many rooms (reports around 2.2x in Act 1, higher later). Fights last longer, so chip and multi-hit elites punish you.

• 2
  Enemy attack numbers often do not double.

  Block and Weak therefore punch above their solo weight.

• 3
  Debuffs are shared.

  If one of you applies Vulnerable, both of you deal more. This is the most-cited reason coordinated duos beat uncoordinated ones.

• 4
  Some elite buffs scale extra-nasty in 2P

  (block-on-hit shells, stack-building enemies). These are the run-killers if you try to race them with raw Strikes.

• 5
  One death is not a wipe.

  The survivor can finish the fight and the downed player comes back at 1 HP. Do not both greed.

1Pick a Pair That Applies Weak and Vulnerable Early

• 1
  Highest-praise duo: Ironclad + Silent.

  Ironclad tanks and Strength-scales; Silent keeps Weak, Poison, and Vulnerable up so both decks hit harder.

• 2
  Avoid two scaling specialists

  who never find a debuff - some Defect + Necrobinder pairings get called low win-rate when neither drafts control.

• 3
  Same character twice is fine

  if you both draft into shared debuffs (double Necrobinder is a low-comms synergy).

2Draft for the Other Person

• 1
  First three hallway fights:

  take any extra attack or AoE over extra Defends. Act 1 2P elites punish starter decks harder than solo.

• 2
  Priority cards:

  Weak, Vulnerable, Strength-down, multi-hit, cheap AoE. One player runs debuff uptime, the other runs payoff.

• 3
  Do not both race identical aggro.

  Two half-finished damage decks lose the HP race; one control plus one damage usually does not.

3Call Out Turn Order, Not Just "I Have Damage"

• 1
  "Vuln going out - wait."

  Simultaneous turns mean you can dump damage before the debuff lands.

• 2
  "I am blocking the big hit, you dump."
• 3
  "Focus left / kill the buffer first."

  Players who skip callouts describe the same hallway fight as impossible; players who do it describe 2P as easier than solo.

4Path Like You Are Poorer Than in Solo

• 1
  Act 1 elites are the wall.

  Skip the first elite unless you already have a potion plus a real damage card plus some Weak or Vuln.

• 2
  Prefer a campfire or shop before the first elite.
• 3
  Act 2 is where 2P HP really shows.

  If both decks are still starter-plus-two-cards, take hallways, not back-to-back elites.

• 4
  Vote the map together.

  Do not split-brain into an elite gauntlet.

5Combat Rules That Save Runs

• 1
  Keep Weak on the enemy almost every turn.

  Incoming damage ends 2P runs, not the lack of a 40-damage turn.

• 2
  Focus-fire.

  Multi-enemy elites punish split targeting because scaled HP means you do not clean the board in time.

• 3
  Potions can be thrown at your partner.

  Use that for energy, draw, and smooth turns - not just self-heal.

• 4
  If one of you is at 1 HP after a revive,

  the other must block for the team. Do not both go lethal.

6Relics, Shops, and Ascension

• 1
  Draft relics by role:

  offense to the damage dealer, sustain and block to the tank. Do not both grab the same shiny Strength relic.

• 2
  Brimstone warning:

  it gives you Strength and enemies Strength - teammates will hate you if you slam it without a plan.

• 3
  Multiplayer Ascension is a separate ladder.

  The run is capped by the lowest MP Ascension in the party. Climbing 2P A9/A10 is widely called the peak difficulty of the game. Do not queue A10 just because you cleared it solo.

Decision Points

Common Mistakes to Avoid

• ✗
  Playing two independent solo decks and wondering why HP feels like 3x.
• ✗
  Ignoring Weak uptime because "we have damage."
• ✗
  Taking Act 1 elites on starter decks.
• ✗
  Ending turns at different times or dumping before the partner's Vulnerable.
• ✗
  Treating a downed partner as a wipe instead of a 1-HP extra body next fight.
• ✗
  Assuming 2P is "solo but safer." Uncoordinated 2P is harder than solo; coordinated 2P can be easier.