Where was oden haki then genius.
He had ryou and CoC both.
Where tf his flow went?
Enma is repeatedly have said to suck on ryou , armanent Haki.
Not AdCoC genius.
Conqueror coating is totally different thing from armanent coating.
Luffy after knowing both CoC and Ryou , didn't pull out shit until He figured out what kaidou is doing.
CoC and AdCoC was a result of zoro going all out.
He held back this whole time and enma forced him to not held back , his AP increased only due to the fact zoro allowed to increase his output of haki , Zoro literally quotes " He need to unleash Enma more " .
Because he kept it under his control but enma was not satisfied with that , and little by little he kept increasing his output.
His AP only increased by each attack he did.
By the time it was king battle , enma demanded more and Zoro went all out no holding back (which luffy always does with G4 , that's what G4 is pushing Haki and DF to maximum).
Moment He unleashed everything, all of his sword got same output of Haki and he unlocked KoH.
King of Hell is just Over blown Haki output.
As a result of Going out he awakened Dormant CoC and AdCoC at the same time.