Ice Cave sucks shit. Instakill Sorcerers that can paralyze the whole party, Mages that have a 90% ambush rate and rape you with partywide spells stronger than anything you've seen before, wolves and dragons that also cast partywide spells, undead enemies that can paralyze those they hit, cockatrices that can turn you to stone, and all of this shit in the same dungeon. You can't even Exit out when you get the Floater because you need to classchange to do so, and classchange is locked behind the Floater.
It doesn't matter how good you are, you're resetting a ton just to get a run through that doesn't end in your asshole being blown open by any of the above enemies.