One thing is clear, both Luffy and Zoro saving adv CoC and maybe even adv CoA, better said Oda is saving that for the big fights later against Kizaru and Saturn.
Or perhaps Luffy and Zoro vs Kizaru if Saturn isn´t a fighter, but for sure he save their power since adv CoC should be the answer to hurt Lunarian durability even with flames on(look at Zoro vs King), Oda is trying so hard to not let show Luffy and Zoro flexing with adv CoC and even adv CoA.