You have the right idea for SCH. Also, depends if you have the DS timing aligned to allow the tank to hop into the conflags. Remember that SF is a 30s skill: It should always be up if you can manage it. SCH, SMN, and BRD are the few classes that can also hurt the conflags that they are in. For WHM, CS'd StoneII and Holy are your best bets: depending on how mana is managed. In the divebomb phase, ballad should be up to get the WHM ready for snakes.