So our Vet DSA team has been doing a lot better getting to round 10 (70 minutes to get to round 10). We do a great job on the final boss, sometimes only having to split once or twice until we get to 25%. 25% is where the problem kicks in tho. The boss curses some of us with a purple fog effect and our Health is cut in half. After that the fire phase kills us almost immediately (usually the dps).
Does anyone have a strategy for this? usually the DPS is dead and the healer and the tank finish the bosses remaining 4% health up on the stairs.