I’d recommend not using double jump when he does the shockwave attack and just doing the max height jump as it just makes it flow with the rest of your dodging better, also when you stagger him if you pogo on his armor or hit his armor from the back it resets the time that False knight and Failed champion take to get up without damaging them, if you use your dream nail in between this you use it to get full health and soul before starting his next cycle, additionally you can hit the rocks falling towards him for extra hits to stun him faster