Twin Emps will require two teams to pull it off. Its a bugged fight with a messed up aggro table. One mistake and its all over. You can totally live through the damage, but if screw up the aggro tables and get the two together, they instant heal to full - and you can't out dps it. If helps to have a 3rd party on bug nuking add duty too.

C'thun will pwn you. There is like 50 things going on all at once inside the room. If you've got like 5 people (independant) its cake at 80. But boxing it? Ya......