Originally Posted by
Dracodraco
This is where it shows that you've never done heroic garrosh. Put it this way - The desecrates, Iron stars and normal whirlings are completely irrelevant. If you are wiping due to people dying on any of that, the issue isn't "switch talents to help combat the effects", but rather, "tell the healers to shape the fuck up". Halo is actually up for every normal whirl aswell, and if you bait desecrates, your disc can easily run out and get a super-tuned halo off on the entire raid during them.
That said, Empowered whirls is the one "hard" aspect of healing this entire encounter. If you want to optimise for something, you optimise for THAT. And Halo is just by far the strongest talent for dealing with the emp whirls as the entire raid is largely spread around the room, giving it optimal conditions. Not to mention it helps in the Jade Temple phase (300-400K hit on 9x adds if used when you enter, helping the dps requirement in there - the only hard DPS part of the encounter).
If the priest gets aggro from minions because of halo, he's got to trust that dps/tank(s) will taunt the extra ones off of him. Nothing else to do. But consider what you'd be doing with Divine star during empowered whirl... Twiddling your thumbs? It'll hit two people, maybe three if lucky, MAX.