Oh crap, you traveled in time. You are a key member of the FFV developer team. You have time to implement one more job in the game! So, what would you create?

I would make a Dragoon Mage. Basically, you can either jump like normal, or you can cast black magic and throw it high in the air. During the air time your character is twice as vulnerable to attacks, but when the spell lands, it will be twice as powerful.