How does Doom work exactly?
Doom is a debuff that accumulates on an enemy. When the enemy's current HP is at or below the Doom threshold applied to them, they are executed instantly — they do not need to reach 0 HP. Doom ignores Intangible, meaning enemies that reduce all incoming damage to 1 can still be executed by Doom threshold. No Escape (10 Doom upgraded to 15) is the primary applicator.