Additional information about things I missed would be greatly appreciated, as well as information from another class perspective.
----- Blackrock Caverns -----
Evolved Twilight Zealot -- Has an ability called Gravity Strike which will inflict 60% of it's current health as damage. Be prepared for a large heal when you see this one coming especially early on in the fight.
Defiled Earth Rager -- Uses meteor. Make sure everyone is stacked up so the damage is split. This will one shot someone who is standing alone. Just keep everyone above 50% health or so.
Wounding Strike -- Reduces healing by 25% on the tank. Ask the tank to watch for this and pop a cooldown when it happens.
Quake -- Make sure everyone knows they can move out of the dust clouds to avoid the majority of this damage.
Chains of Woe -- Throw some dps too at this if you can. The faster it breaks the more time you have to get away from...
The Skullcracker -- Pretty much insta kills anyone who didn't get away after chains. Everyone has to run away. Tank and all. 95K-105K damage
Corla, Herald of Twilight
Be prepared to do the beam dance with a dps. This makes things a lot easier on the tank who needs to be focusing on the add.
My preference is to take a beam first, switch at ~70 stacks, and then get ready to put some big heals on the tank.
Evolved Twilight Zealot -- see Notable Trash
Having the tank save cooldowns for evolution helps a lot. An unfortunate Gravity Strike can really turn this fight ugly fast.
Typically if you can make it through the first 10-15 secs after the evolution, this fight is a breeze.
The guy himself isn't much to worry about. He has a cleave though so keeping good positioning is key throughout the fight.
The easiest way I've seen this done is to have someone off-tank adds when you need to cool the boss down.
So healing for this fight becomes:
-- Slowly heal the tank as he shouldn't be taking too much damage from the boss alone.
-- When the tank dips the boss in the fire (1-2 stacks), throw out a couple of AoE heals to repair what you can. Don't stress about anyone above 50% health.
-- Be prepared to heal an off-tank when adds spawn. (Adds cannot die near the boss or he starts the AoE damage.)
This fight will test your regen for all it's worth. Spirit food and a Ghost Elixir can go a long way to help keep you going.
All of the smaller dogs can be CC'd and it's strongly encouraged. Have the dps take out anything that the group can't keep locked down and burn her fast.
Fear is probably the worst thing you'll have to worry about as a healer. It had a tendancy to make me run all the way across the room from the tank.
Other than that, if everyone avoids the lava puddles and the small dogs don't run out of control this fight is pretty easy.
Ascendant Lord Obsidius
Very easy boss if you have a dps who knows how to kite well. They can be slowed. The kited adds will put a debuff up that pretty much nukes your ability to heal that target, but if the person is worth their salt they shouldn't be taking damage anyway. Tank healing is very easy on this one. There is a magic dot that should be dispelled: Twilight Corruption.