We downed the 10 man Faction Champions (Hard mode) for the first time last night using the following raid set-up:
Resto Shamam (me)
PVP Destro Specced Lock
Unholy Dk (dps)
We were up against:
We had reached this boss encounter for the first time last week and hadn't managed to make any real progress, mainly (I believe) because we had no lock in the raid to deal with the resto druid and therefore we had tried to burn down the druid at the start (without any Mortal Strike debuff). We found we were losing people almost straight away to the rogue, especially if one of the ranged was on the rogues target also.
This week we switched a raider onto his alt lock which he respecced pvp-destro. He was able to pretty much take the resto druid out of the picture (The druid managed a measly 3k HPS and was the last kill). The fury warrior was on the priest the whole fight interrupting etc. and our boomkin was cycloning / rooting the rogue.
Our first kill was the enh shaman who we burned with heroism, the second kill was the rogue and then having removed the melee dps the fight was pretty much over. Our disc priest was spamming Mass dispel a fair amount of the time to keep HoTs off the nuke target as well as cleansing other debuffs on them and us, this seems a much more effective method than purge spam by a shaman as it cleanses the nuke target of HoTs but also dispels a myriad of other debuffs / buffs from both us and the enemy.
If you are facing a resto-druid I would strongly recommend taking a lock as it pretty much changes the fight from 10 v 6 to 9 v 5. Put a rogue or a warrior on the second healer and you are down to 8 v 4 and those odds look a whole lot better.
Any shaman you have in your raid should be dropping grounding totem every cd, as whatever it absorbs will be worth the gcd it costs and earthbind totems also help until you have cleared up the melee dps. Whilst the enemy healers are being largely neutralized a Mortal Strike debuff on the nuke target should be maintained if at all possible and if the enemy team has a shaman the totems should be stomped asap. I found it quite easy to just run round meleeing the totems as a healer as it doesnt really interfere with the decursing/cleansing that i was spending most of my time doing.
Another thing that should be made clear to the raid members is that each players priority is to stay alive, they can't expect to be healed through damage and should use any cc abilities they have to help keep themselves alive, unlike on normal mode when you see a melee dps running towards you, you can not expect a tank to taunt it away and you should either cc it, or more probably run away.