Nihilus' annihilate cadence

Can we please fix this? This is one of the most frustrating things in the sith raid. Nihilus will have a 1 turn cool down on his annihilate, so I'll use unbreakable will to keep my characters alive. Then on his next turn he'll use ceaseless carving and should then use annihilate, but then sometimes he just won't feel like it and he won't use it and he'll do ceaseless carving again. I get frustrated, and then next time he has a one turn cool down, I learn from my apparent former mistake and I won't use unbreakable will yet. However, this time he uses ceaseless carving, but the he DOES use annihilate! Both times I lose a character because Nihilus can't friggin count! Please fix this. "A war is impossible to win unless there is a plan." In this case, I try to make a plan but every attempt gets nullified.