Originally Posted by
Cirque
Well the issue with the tentacles is that you can't just spread and nuke because of the healing, but if you focus fire on 1 tentacle you'll waste a lot of DPS since they don't have that much HP. So basically you want to test what your healers can and can't manage, maximize healing output and damage in that phase without wasting any damage.
We have a gathering point where the claw spawns, and from there on, different people have different jobs. Near the claw, an eye and a flail spawns. I as a warlock will help cleave the claw and boss with dots/shadowflame while burning down the flail, after which I move on to the eye right next to it. Our two other ranged are on the other flail in the back, and one of them comes to help and assist me as soon as their flail dies. Our warrior is doing something about the eye in the back and moves to the same eye I at that point am working on. The remaining 2 melee are on the claw and cleave the boss (rogue & DK). This way, everyone is within range of the three healers, who stand between the claw and the two casters who work on the flail in the back. Two melee, me and the tank are quite close to one another so we can get rain/efflorescence'd etc. Two other casters are close to each other too, the healers are grouped, and thus the only one who's on his own all the time essentially is our warrior.
At the end of black phase, two eyes will still be up. All melee move to the boss, and (a few) ranged nuke down the remaining eyes, except before the 4th black phase, which is where the boss will die: after the 3rd black phase, we ignore the remaining eyes. To help this, at this point the raid is in a different position than when we started, namely the boss facing the two remaining adds to spawn the orb there, and possibly moved a bit closer as well.
Furthermore, the enrage is really tight, so this boss is about spreading your damage as necessary between adds to survive, and to the boss to not get owned by the enrage. Distance between melee and ranged (or whoever is bouncing in your raid), and minimizing that as much as the orb cooldown and healing allows for this is important. Furthermore, having cleaving melee on boss/claw, and dot classes that aren't much use on burning remaining eyes down after black phases on boss instead may help too.
Good luck, hope this didn't sound too confusing, but it may give you an idea regardless. Try different positioning and roles during black phases, and push your healers to their max. Both our arcane mage and me (demo) lock used our cooldowns on tentacles, without having any serious enrage issues, so don't hesitate to try this out too -- just make sure everyone has their cooldowns for the last burn, usually 4th, where everyone ignores tentacles and you nuke your brains out.