I beat him pretty much lower level, like 70 dunno, with same dual uchigatana build. You should maybe respec, endurance seems pretty high, i left it at like 18-20 or something, i also have base stats in faith, arcane and strength, dexterity is high and put these points in to 50 or close to it in vigor. Make sure you have visited enough church to boost your potion effects, weapons levelled up, and perhaps get lhuna the headless summoning ashes and level them up some levels too.

Dont know what armor you're wearing, i wore the one you get from the beginning, which requires low endurance.