Antinomia: FF6

You're sure you don't just want to use the full roster patch that the members of this community have made? You could make Mog fully playable and selectable. You could also use Hatzen's guest adder patch to make Umaro a permanent guest, since you can't change his equipment anyway. I have all of my notes for moving Umaro to slot 0F, freeing up slot 0D for Mog.

Nah, that's getting beyond any kind of problem I'm even trying to solve.  I'm fine having Mog as a guest character and so far he's working as one.  The only issue at the moment is still whether it's possible to have Leo's equipment and skills locked in WoB and unlocked in WoR without giving him two different actor profiles.  And if not, I already have a story-based workaround for it, so it's still not a show-stopping issue.