For all you holy priests who say LOLWUT to PvP like myself, you may find the Faction Champs particularly difficult. Here are some simple tips that may or may not help you. I don't actually know, but hey, I DIDN'T DIE (nor did anyone else).
Put on your DPS gear (assuming you have no PvP gear). The hit rating comes in handy. Or at least, put some hit stuff on, somewhere, but your spec can remain the same.