Enchanted reprise as an oGCD

[LunarEmerald]

Red Mage improvements I'd like to see:

- Buff the potency of enchanted reprise so that it becomes your go-to whenever you're moving and you have no ogcd or dual cast available.

- Give corps-a-corps an additional charge so Red Mage can have a gap closer that isn't just used for their combo. The cooldown is too long to be used for anything but.

- Buff engagement to 200 potency so jumping back isn't always preferred. Let displacement be an option to quickly jump away, not something we're forced to use for maximum dps. Let it be a choice.

- Reduce all MP costs by 20% to go back to the same MP cost ratio we had in StormBlood. Except verraise, leave that as is.

Do those changes and the job would be nearly perfect imo.