Savage is too easy

[Pepsi_Plunge]

Slow, Interrupt, Stun, Blind, various debuffs and buffs, none of these truly matter (aside from knockback, which I must point out is used to solid effect)

Knockback is acutally the other extreme. While many role actions don't get any use, knockback is an overused mechanic. You have it constantly in E2, E3 and E4. At least Interrupt is needed in E1 instead.

If anything, Alex ultimate is too easy. Alex can mess with time, so really, he should just go back in time and prevent any character who unlocks his fight from ever being created in the first place. You can't beat him if you don't exist. Or at the very least, your character instantly dies the moment you enter the fight since Alex kills you before the fight begins. When will an enemy actually use their full power for once?

Can't do. Alexander Ultimate (and Savage) is an exaggerated song, told/sung by a Minstrel and it wouldn't make a very good story this way.