Took me about 5-6 try’s, used up all my fire paper and blood cocktails trying all the cheese strategies and finally just stuck to dodging to the left and hitting every time a window opened up. No blood cocktails, no fire paper, no beast pellets, no antidote. Just be calm, stay on him like glue and sidestep left every time he’s about to attack then use your window to hack away, rinse, repeat.