One of you need to trinket if you guys are caught in double CC, generally pally trinkets first. You don't really need to use damage reduction cooldowns unless you see big burst coming since you have two healers. If you're going mage make sure the priest is cleaning the mage off and keep him free of buffs. I'd personally say alot of swaps to priest, hoj on priest while war bladestorms and generally 2nd one he will go down if their team isn't peeling hard. Priest can also go for burns on the other priest/mage as well if you're going for the long game.