There is something about the last boss in Vasty Deep (solo) that seems off. Every time I go in there it seems to hit me harder than before. But today it was basically impossible. I was taking 259 million incoming DPS mostly in crushing damage. I can't solo heal through that and neither can my merc.
That is 259 million damage per second. In a 40 second fight I took 2.5 Billion damage. A single auto-attack hit me 893 million. That is Crazy from a solo mob.
There is a bug report open about this issue as it was happening frequently with rogue classes. The % based damage hits especially hard it seems when geared well and using a lot of fast attacks with procs.