End game, you're describing endgame, which BLU needs to be part of.
Also the only "Broken" thing you've come up with is using a literal exploit to self destruct for a DPS gain and kill trash slightly better than other classes. Until it can actually do something broken or worth being a limited job, I'm just going to assume you vastly misunderstand how combat works in this game leading you to misguidedly think things are broken when they are not.