The biggest one right off the bat I can think off is T13. Managing your CDs is important because when it comes to rapid hitting Flare Breaths, healing 3-4k damage per each is a lot better than 6-8k. I'm not the tank in question, but I've seen the silly heals. There there's always the final phase of T13. While it still mechanic-ish, you still need your CDs to survive the hard hitting things.