To add to this the Aquapolis is item level synched to, I believe, i180. This means you can't steam roll it with level 61+ characters. I would advise you bring at minimum 1 healer with you if you plan to try tanking it preferably bring a full party who each have their own map as Aquapolis can give 200-300k per run if you get treasure goblins on the lower floors, and some of the minion pets and furnishings from the 6th and 7th floors sell for millions.