So, I've gone into this dungeon twice so far on expert and both times we got through the dungeon with relative ease - a bit too easy in my opinion, up until we got to Manslaughter. This guy is pretty ridiculous and currently, I feel, almost undoable in a pug. If even a single person dies during the fight you begin to fall behind on destroying the mines, and then you run into the possibility of people getting teleported and snared in the middle of mines since he roots himself to one spot, often times for multiple abilities in a row, and it makes kiting him very difficult.
After two 3 hour attempts at killing him, both groups I was in failed to do so (once with me dps'ing and tonight with me tanking). The fight is extremely difficult because you not only have to have a healer that can dish out massive HPS, but you have to cleanse the DoT off too, which often times still leaves the person nearly dead by the time the DoT's been removed.
I'm all for challenging content, but this guy needs some tweaks. The average PUG just won't be able to handle him and it's to the point where we're considering just skipping him after we've down the first bosses because of how ridiculous he is.
Has anyone else run into this boss and experienced similar issues? Also, any tips outside of the regular strat would be much appreciated.