That moment when...

[Ehr]

TBF I learned 3 stacks tank, 2 tanks DPS/Healer, works well enough. (I think +1 stack each for the Marlboro boss?)

The debuffs do different things. The one in the first boss is a DoT while the one during the last boss makes you take more damage. So the general rule for the last boss is 3 stacks for everyone because it does a cleave that actually hurts quite a bit at 3 stacks on tank. So you can get away with a tank having 1 more stack in the first boss, but if you do that during the last boss it can get iffy depending on the tank's gear and the healer's skill level.