Bloodlust to get to low health. Sacred oath and sunlight straight sword buff. Morion blade, Heavy Lothric Greatsword+10 with Carthus flame arc, fire and lightning clutch ring, (twinkling) dragon torso stone, roar, Knight’s ring, and ring of the sun’s first born. Now get a buddy to use the Lothric war banner buff. Roar. And use stomp. Can hit for upwards of 3k damage.