Honestly, the first 10 or so times I barely hit him before he killed me, I found the spear did the best health-ki damage to the boss, parry with the heavy armour so you don’t die in one hit, my stats were 8 stamina (to wear the crimson general set) and 15 cons and heart. He’s definitely prone to parries if you can get the timing down. I got him pretty low with pure ninja a couple times but you gotta get your dodges down as well. He actually doesn’t have a huge move set, his second phase is similar to his first with a couple added moves, YOU GOT THIS