I haven’t played this in forever but I remember just spamming the face melt thing. The battles are just RTS fights ripped from the game Sacrifice. Fly around, and when you see a concentration of enemies land and face melt them. Past that be efficient on the soul economy (might not be called that, that’s what it was in Sacrifice).

I don’t remember it being a very challenging have tbh, but I’d played a similar strategy game before.