Just wanted to post about something I found out. 3 dps kicked the bucket at above 80% and my rogue partner lived with his own cooldowns and health regain untill 10% with me but I was able to live from 80% to 0% with entirely my own spells. ( And 2 bandaids). I'd love to see if anyone is able to do it from 100% to 0. I can only assume it is possible but after that I don't think I will ever do it again.
The damage is very managable from melee with death strike healing in tank spec and the biggest damage comes from the 50k hits of chain lightning. Go and try it out!