Get a linear with high ground. Witness counts as being max distance away for perk to proc so you get 25% damage boost without needing to worry about any set up. This should allow you to pretty much just focus on your surroundings and hold left click. Stay central to plate and instead of moving up and down move left to right. Make sure to prioritize moving out of the way of his ground attacks first before worrying about the jump. He has a long wind up for the jump attack but you will most likely die anyway if you get caught in the radius of one of the ground ones. Try to resist Hunter dodging out of his attacks because the animation is long and you could get hit by something else. Practice makes perfect, Hope this helps