I've tried SOA, Virtus, Divine, Yak full of brew flasks, didn't get to the 3rd form. It was awful against the tortured soul that spawned, did ok damage against qbd Tried again with Pernix, Dragonbane bolts, CCB, EEK, got a bit further but I'm giving up for now til someone comes out with a guide haha -Need to kill it to wear completionist cape lol