I agree with the Regain that would be the most bad ass thing, would prolly be my next farming avatar since I do Spirit Taker like crazy. But Regain seems too good for them to add it so next thing would be Store TP? If not then Haste lol. I don't know what Cait Sith does, I'm not that far in WoTG yet then I would probably have a clue of his favor.