I did it at level 35. Rolled to the left behind the pillar and shredded (thousandstrikes) the two paladins that got round. Then I just ran around the whole place avoiding the bosses. Mostly hunting those damn rangers 'cos their stun is truly lethal. Then summoners and healers. Avoid the enemies healing ability by using Fatality! Train it up. Same with the kings, fatality.
Of course, I did have my handy bottle of Allan Brew so...
