Going by how G2 Luffy performed against Hyouzou compared to Zoro vs pilled Hyouzou, G3 Luffy vs Pica and Fujitora vs Zoro's no named sword slashes against the same opponents, all of Luffy's CoC moves are weaker than the En-õ Santoryu Onigiri that King tanked, Kaido's durability can't handle the scabbards ryuo, Luffy isn't even slightly stronger than Zoro.
Luffy needs G4 to even reach King and then he runs out of haki unless he has a nuke on the same level as Zoro's final attack, G2 and G3? King eats that shit for breakfast.