Luffy used Gear 5 but no advanced haki (ACoC made him top-tier, not G5), he didn't get hit even once by Lucci beyond that one clash, and he caused Lucci to lose consciousness (by his own admission) with just three attacks. Zoan awakening boosting recovery is a thing btw, and Lucci slandering Luffy means absolutely nothing lol, unless you actually value the opinion of that CD dickrider.
Kaku, who is weaker than Lucci, looked just fine after getting overpowered by Zoro.
Both Luffy and Zoro are way stronger than Lucci and Kaku, and Luffy is clearly stronger than Zoro while Lucci is clearly stronger than Kaku. I don't know why you're trying to make Luffy bad here, when he actually brought Lucci to unconsciousness and Zoro didn't do the same against Kaku. But Zoro also didn't use any named attacks, so it's whatever.