The only case where Luffy won a fight thanks to his haki is 0, yes 0.
Even in Katakuri fight, the game changer wasn't haki. Unlocking Future Sight was number 2 factor, the game changer is Katakuri being retarded: eating before making sure he already finished Luffy, allowed Luffy to run away using Brulee and finally stabbed his own stomach.
So Kaido's statement "without DF you can still dominate" won't work on Luffy.
Bar Katakuri, Luffy's 3 most extreme fights are Lucci, Doffy and Kaido. All 3, Luffy is carried by his devil fruit: Gear 2/3, Gear 4, and destiny mythical gear 5 Nikka.
Even in Katakuri fight, the game changer wasn't haki. Unlocking Future Sight was number 2 factor, the game changer is Katakuri being retarded: eating before making sure he already finished Luffy, allowed Luffy to run away using Brulee and finally stabbed his own stomach.
So Kaido's statement "without DF you can still dominate" won't work on Luffy.
Bar Katakuri, Luffy's 3 most extreme fights are Lucci, Doffy and Kaido. All 3, Luffy is carried by his devil fruit: Gear 2/3, Gear 4, and destiny mythical gear 5 Nikka.