Short descriptions of each fight, with actions you must take in bold.
Two adds and Anub. Keep your distance from everything at all times. Focus down the adds while the tank holds Anub, then switch to Anub.
The tank and Anub will start to move around the perimeter of the room, and a new add will spawn. Switch focus to the add, but keep your distance from it and Anub. The add can root you with a web, and if Anub gets close enough to you, he'll silence you. We'll probably wipe if that happens to the healers. Anub will send out waves of little critters. AOE them down.
Eventually the tank and Anub will land at another spot in the room. Rinse and repeat. Keep your distance.
Use a nature potion and fire potion to start.
Faerlina has two normal adds, the Followers, and four special adds, the Worshippers. Focus down the Followers and never attack the Worshippers. Once Followers are dead, switch to Faerlina.
Faerlina will occasionally cast Rain of Fire. It does big damage, but there's a small delay to the first tick. Stop what you're doing immediately and move. DBM will give you a warning if it is on you.
Faerlina will occasionally cast a poison volley. Cure the poison if you can. Re-apply a nature pot if you can. It will help the healers out.
Every minute, Faerlina will enrage. The priests are supposed to mind control a Worshipper to dispel her enrage and silence her for 30 seconds. The Worshipper dies in the process. We only get 4 uses of that. The fight is going to be short. Stay alive and get your damage out.