I have to be honest and say I don't like any of them. I don't really like their appearance and can't see a use for them in battle.
Soul of the mind, key to life's ether. Souls of the lost withdrawn from its vessel. Let strength be grant so the world might be mended... so the world might be mended.
Blegh. Annoying ugly marketing devices.
I'm not really into the elemental monkeys, but if I had to choose one, it would be Simisage.
I don't like pure types. Most pokemon on my battle team are mixtures of different types. Except for Musharna. I had a Pansage which I levelled up to 30, but I just gave it up after a while - it wasn't very effective. I ended up catching Virizion with a single ultra ball, and well... he hasn't been in my team since.