Pink Been question

The pink bean battle is stupidly planned out as a whole. You only need 8300hp for the first four phases to survive really (Huigin's attacks when crossing the room), the rest of it is just too ridiculous. You can't even see the marks on the floor for ariel's 13k attack unless you're on the floor, in which case you can't hit her/it. It's possible to avoid all of pink bean's attacks other than its 1/1 by standing behind it all the time, but once it turns around, you'll be blasted by 11k + stun attacks. I'm not sure how aggressiveness works with 30 people hitting a monster at once, but I'm somewhat sure that it's impossible to keep it facing one side away from the ranged classes 100% of the time.