Surprisingly, this was one of the harder challenges I did. Without being on level 1 you can kill him in a second, but once you actually have to dodge his attacks, it becomes a challenge. All the fire attacks have loong lingering hitboxes that will hit you if you try to roll, so the only option is to warp out of the way. Warps however do not have instant I-frames so every move has to be predicted. Luckily, the parry was still pretty simple to pull off.
Build: imgur.com/a/iB...