With the newer FF jobs, Red Mage doesn't lend itself well to cross job concepts.

A tangent here.

Red Mage in olden days used many Fighter weapons, medium tier armor just not the plate, a shield, with access to most white and black magic. In Ivalice, there's the introduction or popularization of Green and Arcane magic. And then there's Time magic.

If jobs don't exist for Green, Time, and Arcane, then those spells can be rolled into White, Black, and Red Mages.

And if Red Mage becomes a specialist, then he isn't following the hybrid design. Which leads to spells no other job has or that the Red Mage is a superior caster on this.

Just pondering aloud.

/tangent