Beat King
Magic drug wears off (might happen during the King fight) and he needs to rest, giving Luffy plenty of time for a 1 vs 1 with Kaido
Get back to his senses in time for one last hit on Kaido, where he turns Enma black. That’s the time where we’ll see if Zoro can kill him.
King does not finish Zoro’s story in Wano, but Zoro has been put down in the live floor to beat him.