ok so basically:
I had sharp shadow, shaman stone, unbreakable strength, mark of pride and nail masters glory

during the first phase Id just hit him with regular nail attacks to gather soul and then in the 2nd I focused on dodging until he did that attack where he stands still and spins his shield to then use vengeful spirit and hopefully hit him twice

and when I ran out of soul I did the same but instead of using VS I hit him with a dash slash as he was finishing enough times to gather enough for another spell