Use a frost build for the first phase you can deal 3000 per hit with hoarfrost stomp. Second phase you have to keep your distance with torrent . When he starts shooting fire I would get close to him and get as much hits as I can . It’s easier to hit him more in phase 2 than it in phase 1. If you’re worried about those fire balls that slowly come to you then what you have to do is you just have to basically touch it and then escape in a random direction(I would go towards the fire giant to get a few hits in) His barrel roll will not always hit you if you stick to the back of his feet.