It is my understanding that when faced with 3+ mobs, basically swap out mutilate for fan of knifes, and try to get 3ish ruptures going.
However, often my dps is lower than if I skip spreading the extra ruptures and instead stay on single target with fan of knives filler (with deadly poison).
Is there a general "rule of thumb" for when to spread extra ruptures? I am guessing its based on the amount of HP the mobs have, but wanted to get some feedback on the thought process for when engaging 3+ mobs.
Also, does that process change when using agonizing poison?