One complaint levied against modern fantasy is that it adheres too closely to certain cultural stereotypes. There’s not just a “fighter with honor”, there’s a paladin. There’s not just a supernaturally powered healer, there’s a cleric of a god - or pantheon of gods.
The Final Fantasy franchise has done interesting things with some of these stereotypes, and hewed to others. What if we start with the FF jobs, and remix them to see if we can make something really new?