Duration and stacking
Many status effects, namely blight, bleed, buff, and debuff can stack multiple times until they expire. Despite the game tooltips showing total values, stacks are handled and expire individually.
How do bleeds stack?
Bleed effects do not stack with each other unless they deal different kinds of damage. When two or more bleed effects deal the same kind of damage, take the worse effect. In this case, ability drain is worse than ability damage.
Do dots stack in darkest dungeon?
Seems like the answer is yes, for those turns the duration overlaps.
