You guys will look at my miniscule post count and laugh, but I have read through this thread and it seems like ( and maybe I missed it) but no one is discussing tactics or strategy here or reconnaissance. There is a way to get around the possibility of a death in a Heroic mission or even an invincible mission for that fact. Use some strategy, pull the minions first, use stealth to see what is in the room before busting in like Leroy! I know it doesn't always work but a good bit of the time it does. My two cents! Blast away now!