Elden Ring DLC Promised Consort Radahn Final Boss Fight with OP Lion's Claw and Bloodfiend's Arm

I am on ng, level 150 with 20 blessing other build info is at the end of the video.
For ng+ and more, boss has more stance resistance and damage, this method might not work. Also dont summon NPC, it will make boss harder to stagger. You can summon Spirit Ashes.

Build in the video:
Bloodfiend's Arm with Lion's Claw and bleed infusion (you need Black Whetblade)
Armor: White Mask (10% attack increase for 20s when bleed proc), Bull-Goat Set
Talisman: Dragoncrest Greatshield Talisman (-20% Physical Damage)
Shard of Alexander (Greatly boosts the attack power of Skills by 15%), you can use Two-Handed Sword Talisman instead, its better.
Golden Braid (Boosts holy damage negation by the utmost)
Blade of Mercy (Raises attack power after each critical hit)
Crystal Tear: Winged Crystal Tear (Boosts max equip load by +450% for 3 minutes)
Stonebarb Cracked Tear (+30% stance damage for 30s)
Incantations: Golden Vow (+15% damage, +10% damage negation for 80s)
Black Flame's Protection (+35% physical damage negation, -20% healing for 70s)
Great Rune: Malenia's Great Rune (Attacks dealt after taking damage recover HP)

Strategy:
charged heavy, lions claw, repose, charged heavy, normal heavy (leave second stagger to phase two)
phase two -
charged heavy, repose, charged heavy, spam lions claw, repose, charged heavy, spam lions claw, repose.

If you are higher level, you can add more defence buffs and just spam Lion's Claw to win.
Cheese example and details of build recommendation:
   • Elden Ring DLC Promised Consort Radah...  

Update: Boiled Crab and Black Flame's Protection does not stack, I forgot it in the video.