Break his stuff with Acid Mist and Corrosive Urns. Use a curved sword, Monastery Scim if you can get one, to parry him onto his ass and throw some urns or mist. You can also stop him from rolling through those by using the strong attack from the Spider's Silk. There's also Promised Walk of Peace to stop him in his tracks, but that needs heavy speccing into Hexes for that 30Fai/40Int.
lol sounds like Scraping Spear 2.0