Originally Posted by
adynn
Just thought I'd comment on this to say that drake damage gets higher the longer they are up (I believe it caps at 15 stacks though, which will do 250k~ damage in 10N). Generally the most hectic part in P1 for healing is the 30 seconds or so that your tower team is running/killing the miniboss as you'll have the most drakes and the drakes will have a lot of stacks. Popping a healing/mitigation cooldown here is a good idea as it'll be back up in p2 when you want it. Also make sure you're saving healing cd's in p2 for sub 60% or so (pop one at 50-60% and another at ~20%, attrition style). Killing the shamans and totems needs to be high priority, letting heals go off will require a lot more damage. Personally I would send both dk's up the tower, warlocks have great cleave/aoe (although so do dk's, but the bottom is a little melee unfriendly), mages and hunters also put out very nice cleave/aoe numbers so the class makeup is good, note if you're having dps issues and enemy heals are going off, that's likely the issue.
I think your dps is a little low for 540 ilvl (do they have capes?), it depends on specs and itemisation too but I think most people should be around the 200k mark as a minimum in that gear, it may drop a bit in p2 if people get targetted by fire (melee is prone to this). I currently raid with two groups, one with lower dps gear (around your level but min ~175k at the end of the fight) which 3 heals it, the other is quite good (dps 220k+ I don't really keep track though) and we 2 heal that.
If your healers aren't geared or skilled I would probably recommend 3 healing it, what potential healers do you have btw?
Edit: Druid and Shaman are probably the best two healers for p2, if they are decent I would recommend two healing it. For HPS reference I noticed I (resto druid) was doing ~110k hps while on the ground in p1 and maybe 120k~ after p2 is over, make sure your druid is popping his mushrooms in p2. Our disc priest (who goes up towers) was maybe 80k in p1 and spiking to ~100k after p2 is finished.