I saw a minisentry take 2 charged shots and several regular shots before blowing up. Quite amusing.
Ye gods.
Lose the extra shot and the afterburn on charged shots (seriously, why is that even there?) and come up with a more creative downside than nocrit. (Inability to rocket jump would be hilarious, dunno if it's going too far though.)
Also the projectiles for the damn thing have somewhere in the neighborhood of 4k polygons. (For reference, the Pyro has around 4.5 k when rendered at maximum detail.) That's on top of the giant particle effects flying everywhere. YAY OPTIMIZATION!