Some additional tactics I use for this instance:

High Prophet Barim
Phase 1, make sure to dispell the debuff as soon as you can. It hurts and mostly hits 1 or 2 people.

During the "bird" phase I don't DPS the shadow things, I only DPS the bird. Use your tank to drag it around so the shadows don't reach it. When a shadow reaches it he will only heal for a bit so you don't need to kill them.

Lockmaw
I like standing with my team on top of the stairs and tank Lockmaw at the bottom of the stairs. That way I can pick up and DPS all the crocs that spawn and go for my team. Just make sure to dispell the poison/disease (whatever it is)