He's not too bad but what build are you using? You should have like 20 heals at this point and a lot of his stuff is very choreographed but he is a good fight.
I am doing pretty well against him but then by like the last quarter of the fight he does a spin attack that one shots me. Also, I don't know if this is a bug but the collision fro some of his attacks is inconsistent, and I sometimes get hit by stuff that didn't connect. Is fun, but is really hard as well.
You haven't fought the DLC bosses of DS2 yet have you? All From games have wonky hitboxes with weapons but DS2 has some of the best and some of the worst.