Tie the eye's special ability with Dreeg's Eye for twice the eyes. My favorite build with occultist consists of focusing initially on Dreegs Eye (don't get the passive ability that increases damage and cooldown, it's better to spam it, trust me), then using the points you get from purifying altars to spec into the god, Eye.
Occultist: Easily the most powerful class in the entire game, they've got everything, strong sustain, decent damage, CC, pets (raven has a heal/stun/lightning damage buff, demon dog is a decent tank)
