Nerfs to add phase of Optional fight

Small nerfs to Leaf Blade, X Scissor, Poison Tail, and Buzzy Buzz.

Changed Superboss fight to require level 60 to better suggest it is a very endgame boss.

Reverted Swift back to what its supposed to be.

Fixed music in refight of Superboss.
Superboss now automatically gets next turn when critical HP once to make skipping Phase 3 much less feasible.

Number of adjustments to Superbosses AI to make the final phase slightly more consistent and less RNG dependent on how difficult it is.

Fixed Baddy Bad to be once per fight.

Removed Interrupt from Zap Cannon

Fixed issue with Superboss refight dialogue.
Fixed edge case with Superboss AI.
Nerfed Bubbly Heal potency.

Additional changes to Phase 3 to slightly increase difficulty of dps check.