Over the past few weeks, we've been venturing into Tempest Keep: The Eye, and taking on a few bosses there. We've been killing Void Reaver every week; he's really not an issue for us. We generally burn him down on the first attempt, and well below the enrage timer. But the next boss we've been working on is Al'ar, the Phoenix God.
The point where we're at in the "progression" of this boss is that we can pretty easily burn him down in the first phase, but the second phase gives us some problems. Last night, for example, we killed him once, he rebirthed, and then we got him down to 40%... on two attempts.
Let me explain our strategy, so we're all on the same page here, and maybe somebody can learn from this post. :) First off, you should probably go read about the fight over at wowwiki and/or BossKillers, so you can get the abilities and the general idea of the fight. We use 5 tanks for phase 1. 1 tank stands at each of the 4 platforms where Al'ar can be tanked, and then one stands below to pick up all the Embers starting when Al'ar is somewhere around 50% health. Killing the Embers in the first phase only reduces the damage that they do; it doesn't do anything to Al'ar like it does in the second phase. Ranged DPS mostly focus on Al'ar, and also on about the second 1/2 of the Embers. Melee DPS focus on Al'ar and the first 1/2 of the Embers' life.
In the second phase, we have 2 tanks on Al'ar, 2 tanks rounding up the Embers, and then 1 tank holding on to the Embers while the ranged DPS take them down. Melee stay on Al'ar full time, while ranged stay on the Embers full time.
Here's some of the things we need to work on (all in phase 2). We need to make sure that people get out of the Flame Patches asap. It's a very mobile fight, and if you're standing in it... two ticks, and you're probably dead. I think I need to make better assignments on the healers. We keep losing a tank or two at times where we probably shouldn't. It doesn't seem like the ranged are maximizing their DPS on the Embers. We can't kill the Embers while Al'ar is in the air, because it won't damage him, but we can still continue to dps the other embers. Tuesday night, we probably had one of our best teams of 25 in The Eye, but we ran out of time on Al'ar after downing Void Reaver.
I keep telling people though... all we have to do is not die, and we'll kill Al'ar. :) Hmm... maybe I need to be more specific.