Managed to get 2 clears so far as a WHM. One was standard 2 DPS, 1 healer, 1 tank, the other was 1 DPS, 1, healer, 2 tanks. Its definitely less awful with more tanks since they don't die almost immediately after getting hit.

The hitboxes are a mess. Move far out of the way only to get killed, and then re-appear far out of the area where the dragon attacked. Happened to almost every group I ran with, even in normal.