Tzirathk (Solo) - Center room directly north of the zone-in area ( 17, -5, -688 ) /waypoint 16.78, -5.37, -687.92 Again, pretty much a tank and spank.
Take either side door just outside of the Tzirathk center room and work your way around the Boardwalk to the next boss.
Dread Wraith (Solo) - Basically a tank and spank. Thought he had a slight knockback the first time I fought him but didn't see it the second time.
Kill the 2 stone golems at the door to the north, click the door to open it, and move in to the Hall of Reavers for the last boss.
Neh'Ashiir (Solo) - He brings the stone golems around the room in as adds during the fight. Kill them as they spawn if they are doing too much damage to you. Eventually they are all dead and its just you and the boss for the rest of the fight.