I'm kind of disappointed that RDM is basically the only class with a chance at getting the solo 100 floors achievement yet again (Outside of obscenely high amounts of luck with getting petrification pomanders and/or magicite).

There's simply no way you can stay alive against the enemies on higher floors without some manner of direct heal because of how hard they hit, and PLD/healers don't have the DPS to take out some of the enemies before their stacking buffs/debuffs or enrage kill you.