Did not see it posted here in exploits. I figured it is an exploit since mob runs through wall, sorry if it has been posted I glanced through pages and did a search with cad in and did not find anything.
The final boss in cad, the one that yells keep firing, keep firing. If you have trouble killing, or you just want to keep it simple, have 1 person run in and die, the rest stay in hallway. When 1 attacking dies, the boss will run through the wall and you no longer need to dodge the fire.
Person can rez and run back or just lie there dead.
Probably be a good idea to choose the lowest Dpser as you will likely want your tank and healer.
It is not much but if you got a group that cannot follow directions and run out of the smoke etc. it can be helpful.