The achievement seems pretty straightforward, if maybe a bit tricky to pull off. Keep 5 different adds alive when Lady D drops. There are 6 potential adds (cult/reanimated/empowered adherent and cult/reanimated/deformed fanatics) and since empowered fanatics deal ridiculous AoE damage, the smart thing to do is pick the other 5.
My questions relate to the Dark Martyrdom ability both the cult adherents and fanatics cast. It is my understanding this suicide explosion is the only way to get reanimated adds which makes sense, but is this ability cast every time you bring them low or just on a random timer?
Very related to the first question, if the ability is cast on a random interval (even at high levels of health) how can you ensure no add kills themselves while you finishing bringing lady D down in phase 2?
I'm sure its a pretty simple answer, but I can't figure it out by reading any of the boss guides or mob/ability information and I'd just like to know as much as possible to help things go quick tomorrow when we go to do it Thanks for the help!