Well they already kind of messed with bard and summoner in this game. They play nothing like their original selves, same with monk in a way (monks should have the highest hp pool).

As long as they keep the same theme of a red mage it'll fit. A sword wielding mage and they are pretty much done, just slap on a dual casting like mechanic and you're good to go. That seems to be the bare minimum of what they do with jobs that are more supporty like bard and summoner.