Luffy fought Kaido in base form several times, he knows he has to pace himself. He mentions Gear time limits too as much as he spams them
The same luffy been spamming gear 4 in between so again moot point.

He only started fighting him in base for an extended period of time after he ran out of haki or was knocked out several times etc and that was when he awakened advanced coc. So that's moot. Off rip luffy was using gears lol
 
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