D) added as a regular job but creatively adapted to fit into this game.

To bring up the old dead horse, FFXI had a BLU and they didn’t have to compromise its identity to make it work. Sure iconic spells like bad breath, 1000 needles and doom fell to the wayside as they needed to be weakened to fit an MMO but that happened even in single player FF’s I mean when was the last time you managed to land doom on a boss in any game?

There are plenty of ways BLU could have worked both as a solo job and in party play, like giving it a base weapon such as a scimitar or club and giving it a basic job toolkit around that weapon then having the spells be something on top of that, they could have had “limited” spells only available while solo and “required” spells necessary to qualify for party play.