I don't feel the need to have two Kallus' in the game. One, sure, but two?
And generally, but not always, legendary characters have two zetas. Marquee characters, which both Kallus variants would be, generally have 1 zeta, if any.
I'm also confused as to Empire Kallus' first special. He adds up all Empire allies' health and deals that much damage to each enemy, plus the assists?
And I get what you're trying to do with Clone and the Scoundrel synergies, but his link to those groups isn't large.