Does anyone know how to counter this? By strategy rather than a new build. My (main) build is this.
I can occasionally beat him by switching weapons up. His only switches are those three. I occasionally switch the shield and flame with the Shotel and Quelaag's furysword for off-hand distractions. The halberd is key to my strategy, but I am willing to change my Uchigatana for a different weapon as long as I do not go over 25%
I also occasionally unequip the shield in order to use heavier weapons, such as the Zweihander or Claymore.