And you are dreaming for a perfect world where nothing random that a raid can through at you will affect your dps/rotation. No class has that. For every single fight in SoO during progression even, I've always known where the tank was going to be, where he was going to hold the adds and been able to pre-plant accordingly. Why? Because its something that should be thought and planned out ahead of time and known by everyone. The "shrooms are bad because tanks move the adds out of them" argument should have 0 relevance to mythic level raiding. And people dying? Well that happens, its random, its unfortunate, but its our privilege to brez and I'd rather have that responsibility and utility in the raid and maybe have it interrupt my rotation than not have it so my rotation can be perfect. If I get in an accident on my way to work tomorrow its most likely not going to be my vehicles fault. Either a) I did something dumb and deserve it, or b) they did something dumb. I don't go to Dodge and tell them to make my Vehicle better because this random thing might happen and I want to be perfect.