Giving Carbucle more to do (an easy to implement SMN change)

[AlphaXXI]

Honestly wether or not Carbuncle's position matters or not for radiant aegis doesn't seem like an issue to me. It can just have something that might as well have been on summoner itself, if only for flair (also as much as I uderstand why searing light is now on SMN I think it made more thematic sense to have Carbuncle cast it).

As for the rest of your concerns, I get it, but I never really understood the "0 cast" issue to be honest. You still have to cast during Ifrit, even if yeah that's a lot less than other caster jobs. I don't see why one can't have more instant on principal, they're called casters because they use magic, not specifically because they need to have cast time. But yeah it does need to require more active thinking.