Nah, boss didn't get stuck anywhere, you can rotate around it easily and use items in proper order to kill it, took more than 1 try, spamming skills...
I tried different variations of pets and gears and as rogue I can't get through the 13th curse and I'm pretty much contesting this with maxed gears....
My only question is if did you guys test it yourselves that if it's relatively possible to complete that dungeon with 20 debuffs (curses) on and that...