Enhancement Shaman on Ascendant Council (BoT): Tips/Tricks
Note: This is not a complete guide to the boss fight, if you'd like a real guide please visit Tankspot.com or other such sites. This is merely tips and tricks an enhancement shaman can use to help keep their raid alive and maximize total raid uptime.
Phase One: Ignacious and Feludius
The usual strategy is to have melee dps on Ignacious and ranged on Feludius. However, in my guild I usually dps Feludius because I have the best interrupt in the game. This reduces a lot of random outgoing damage from Feludius's Hydrolance, which helps keep people alive and save healer mana. Good awareness will help you here, as Feludius also casts Glaciate which will kill you if you don't run out. You'll need to keep a good eye on both bosses health and slow or stop dps accordingly. Also, don't forget about Aegis of Flame and the interrupt that needs to go out. Usually I don't switch to Ignacious unless my dps is really needed to burn down the shield, but my guild does 25 mans and 10 mans may be different.
Phase Two: Arion and Terrastra
For this phase, you'll want to dps Terrastra unless Arion is way ahead in health. Remember, when Terrastra has Hardened Skin, they'll absorb a lot of damage until the shield is broken, in which they'll take a big hit. If Terrastra is already a bit low and has the buff on him, slow or stop your dps and possibly work on Arion. If you can interrupt the Harden Skin cast, do it. It's a pretty quick cast so be ready for it. There's really nothing too special you can do here as an enhancement shaman. If you see your group is a little low or healers struggling, use a 5 stack of maelstrom on chain heal. Usually there's a lot of movement in this phase, so Healing Rain is not necessarily a good choice unless you have everyone stacking up.
Phase 3: Elementium Monstrosity
During this phase you can help your healers out a lot. There's going to be a lot of damage going out, so as things progress start using maelstrom stacks on chain heal. Again, with all the movement Healing Rain isn't a good option. Another tip is to wait to blow Heroism until the Monstrosity is down to at least 20%. Blowing it right away is okay, but waiting that 5 or so percent really helps the healers. They're able to get more healing out with the haste buff when the damage gets a lot higher.
If you have any questions, leave a comment and I'll answer the best I can!