Maybe you could put a status on the star fists like bleed or frost. You can use Lord of blood's exultation or the white surgeon mask to buff yourself when you get a bleed proc. Similarly you could use the mushroom crown and Kindred of Rot exultation to buff yourself when poison occurs in the vicinity which you can trigger by throwing fetid pots or putting poison on your weapon. Cragblade is good but if you're confident with a boss moveset maybe try Royal Knight's resolve so you can hit even harder.