ah ok all good. its confusing to talk about lol. for the whole fight id strongly advocate standing directly in front of the boss and deflecting everything and doing mikiri etc when necessary, and just working out when u can get a hit or two in. for phases 1 and 2 be extremely close. for phase 3 be mid distance, basically just within his weapon’s range, so you can step back if need be (due to high posture or being uncertain about the attack etc) sprint a lot when avoiding the charged spin attack things. or the energy blast attacks.
tbh based on ur description of what ur doing maybe this would be a big change, and i assume you dont wanna totally change ur approach to every phase. but idk, when u get to playing it this way it definitely feels like this is how they intended u to beat it. it feels v doable and consistent.