How's about instead of PUP, you have Engineer(ENG). And instead of puppets/mammets you have magitek drones. And instead of 3 drones for 3 roles, you have a single drone you "equip" with gear to change their stats/abilities (basically like retainer gear is now, but the gear adds abilities so you can make your own drone build). Can be introduced if/when we go to Garlemald. Weapon is a wrench/manual. Manual functions much like a shield with PLD but obviously nowhere near as defensive.