Pinkie has great awesome awaken skills but I dunno how much you're going to use her. She doesn't really work as a sub, and only has one color.
Ceres awakenings - bind recover? How often are you going to have her unbound with other monsters bound and then match a full row of hearts?
Izanagi is great, but I dunno how good light orb drop enhance would be since it doesn't work on changed orbs. Otoh, the changed orbs would help to link up the +orbs.
If I were you, I'd put them on Alice. A skill boost, or two for three, really helps to speed up those thorns curses with a 20 cooldown, and the gravities you'll likely have on her team. And, if you do, and you get another one, you can put it on Owly.
Hmm, Izanagi Parvati Verche Megatron and ... Ares? Hera? Zeus! seems like a good spike team with tons of stall potential.