Speed kill, from first hit (0:06) to final deathblow (1:56). I exceptionally count from first hit instead of health bar due to the opener being consistent and same for everyone. Featuring wall-hugging in the arena corner and lightning reversals being a balanced ability. Fast kill and godly p3 RNG.
I promise this is the last Isshin kill for a while, I was getting a bit overboard with it. He's a fun fight though, so I have no regrets.
Personal rules for this kill :
Base Vitality/Posture, Demon Bell + No Kuro's Charm (Charmless)
Sword only (No prosthetics or external damage source, items and skills still allowed)
No hits allowed (including lighting reversals damage)
No Mortal Draw, it's too broken
Max attack power of 15 (No Dancing dragon's mask abuse for AP boosting).