What's the Azmodan leveling trick? I have no intention of abusing it since I actually find it rewarding the level up my characters legitimately.
Legit if the game didn't want you speed running blizzard could've easily have prevented people going in to a certain part of act doing it and then simply leaving to rinse and repeat. That's all it is teleport to a checkpoint just before the heart of sin kill him go to act 4 kill first boss.
Butchers main pull is obvious just watch his arm go up wait and then dodge before it comes out. Unless it's lag it's easy as hell abuse.