It could be interesting, especially if they make something like Ninja Mudras where the potion you'll throw to your party member's head depends on which things you added to the mix, which could also be a nice way to get back what was taken from Astrologian; potions to heal, to buff certain stats, to increase mitigation. Since the risk of making a wrong mix will always be there, it could be the perfect justification to make it the only healer with an always ready res (since that will also be one of the posible mixes)
