Actually, that sounds kinda cool. I can see it maybe being a class where the doll you create becomes a pet slot like ACN or MCH; the pet bar would have either the moves the doll could inflict on itself, or the dots and debuffs you can place on it. The doll's health could go down as you deal the damage, and maybe you could do a final burst attack once it dies. Then you'd move in to resummon/reattune the new doll, and start over.