Eh? Just jumped in as a fire mage and popped every CD I had, boss was dead before time warp was over.
On my druid it just took time, wasn't really challenging.
Took me a few tries as a holy priest because I went in blind, until I realized I could shackle the mobs at the start.
Did it first try on my paladin as retri and thought there was a lot of damage going on and I had no idea what to do there, still killed it first try.
On my rogue I just spammed feint constantly and couldn't die. I ignored most stuff and just let my legendary heal me through it.