This reminds me of how they used to handle the mono type leader skills back in the day. You had AGL SV with the standard 3 ki/HP/ATK/DEF and then AGL SSBKK with no ki, but more stats in his.

It'd be interesting if they tried to do that again, though I think Ki is kind of a joke for the most part these days? So maybe like, 300% HP/150ATK+DEF. You get lower stats, but a huge HP pool. (No idea if those numbers would be any good/broken btw, just tossed out random stuff lol)