Rift Mob:Fire Wing  

Fire Wing, Rise of the Phoenix, Passage of the Ancients

The Fire Wings have a very powerful flame breath weapon, but only one will use it at a time. One will fly towards the party and cannot be controlled by the tank. He will rise up, inhale deeply and then blast directly in front of him in a roughly 60 degree arc. This gives you plenty of warning for where he will breathe, just don't be there when he does it.

Periodically, the two will swap and the tank will need to change targets. The two need to be dropped very closely together so the use of a Main Assist is advised (or voice communications).