Pink Bean DPS

You don't need 12k HP to survive it. You need 8.1k, same as HT. However, you do need to keep PB's Genesis attack from hitting ranged attackers, which can only be accomplished by forcing him to face away for the entire duration of the battle. Pretty difficult, especially since he's mobile and does 23k touch damage. Essentially you'll need to have people KBing him left, then letting him walk right a bit - for the entire duration of the fight - while a pomegranatestorm of things are flying across the screen and everyone is lagging.

12k hp is a "plan for the worst, hope for the best" kind of thing.