In current Frontlines (no one does Wolves Den anymore) it is not too incredibly difficult to kill SCHs. The key is to focus them. With (1) tank and (1) decent DPS you can stun lock them and wipe them out. The key to stunning them is to wait until you have them about 50% dead and then the tank (especially PLD) can stun them a couple of times and they are helpless. The biggest failure groups make versus healers is they randomly stun them throughout the beginning of the battle and they have resistance by the time you actually NEED to stun them to kill them. Too many random button mashing PvPers out there.