I think that it is technically possible using an absolutely idealized group - something like pal, sk, bard, enchanter, sham, cleric. preferably the #1's of all those classes.
but on tier, probably not. it's bugged in a way that includes 8 adds to the fight that are invulnerable (only an SK could pick them up, and would be taking massive damage) as well as all the high geomancers and ofgats himself choosing a random person to nuke for 6000 dmg every 18 seconds, and there can be multiple nukes on a target. so the odds of someone getting instantly killed are really high. add in ofgats pulsing manadrain.
or option b: no one knows the real strat