I'd like it if they had Leviathan, Garuda, and Titan in one set building white magic to charge up Phoenix, then Ifrit, Ramuh, and Shiva building black magic to charge up Bahamut. Idc how exactly each primal plays beyond that personally.

I'm not a fan of the concept of Solar Bahamut in general. I'd rather them just round out the primal wheel and call it a day. Tbh I don't even think I'd want more summons to be added after that either, unless they reworked how classes worked in general. Otherwise the class would get too convoluted too quick. Maybe just new skills each xpac that fleshed out the existing summons or something.