Um... G4 switching in which Luffy completely overwhelms Hybrid Kaido with massive speed (Snake Man), massive power (Bound Man) and massive durability tanking or reflecting his blows (Tank Man) - I hope this is still possible.
I love the g4 switching Idea esp if he still doesnt have a time limit but I still think he does.
the thing with snakeman tho Its power output isnt great
and it doesnt seem like he needs to be that fast for kaido
I say he just goes all out with power and boundman kills this.
at the very least boundman is as fast as he is now if not faster and he is able to evade and hit kaido.