Yikes...
Floor 1-13: tank and spank
Floor 14: kill small mobs first, try to land aoe on every mobs
Floor 15: have to kite the adds as they hit really hard and you don't need to kill them to pass this floor
Floor 16: 4 rabbits... they don't do noticeable damage but the can permanently stun you if they get close to you. Only tank and spank when your remove shock is up. Remove shock or other shock immune skills allow you to do 3-5 seconds of melee skills. Otherwise.. kite!
Floor 17: have to use your potions wisely as the boss can remove all of your MP
Floor 18: mayb