The manga impies that luffy was running from the strings the entire time after doffy awakened. He didnt hit doffy again until luffy got frustrated and just broke through them and hit doffy with leo bazooka. And as far as attack power, speed and defense in concerned, G4 is far ahead of doffy.Dude it wasn't just 5 punches it was like 40 min of gear 4th -.- and it's not miles ahead of doffy -.-