Anger Management has killed Dreadtooth 10stacks (which is still lvl 50) . We have also killed Dreadfull Entity, the secret boss on 16man HM TfB. That boss is tuned to lvl 55. I believe , correct me if I am wrong, we are the server first on killing him.
On a side note. AM has cleared TFB 55 HM for a while now, We cleared it right after the underworld alliance right around the time Aisthesis killed them. I just noticed it still says we are 4/5
http://i.imgur.com/Iqol9Nx.jpg There is the pic for the dreadfull Entity. We killed him 5/31/13 at 10:30 EST pn