61drg/26whm
I went with a gimped sub after what I read on here thinking it would be helpful. Took a scroll of warp and reraise with me and teleported over to vahzl. Got aggroed by a demon or two at the spawn point, but otherwise no trouble.
Will admit I got lucky, a lvl 75 rdm was nearby about to do the same fight and we joined up but it wasn't nearly has hard as I thought.
Hit me for about 50-150 points of damage, depending. I hit it for 80-100 myself and my penta thrusts did 1100+ dmg each time. All in all, with regen, protect, some potions as backup and healing breath, I think I could've soloed it. Not positive, but figured I'd add my experiences for anyone still on the fence here.
Mind you the rdm enfeebed the hell outta that thing. Never got a chance to do more than berserk.