Did training Sandai make Zoros haki stronger despite him not even having it?
You’re trying to twist Rayleighs words way too much to fit your headcanon. I’m not sure if this is your way of saying stronger CoC instantly means stronger character or something, but that’s just not the case.
Did training Sandai make Zoros haki stronger despite him not even having it?
No off of rayleighs words haki is a power that lies dormant in people everywhere. But most never discover it. They live their lives without ever reaching their full potential. Why would i think him training with sandai would increase his haki?
Haki blooms in extreme battle we see this for zoro when he uses ryou to cut steel.
Zoro sees sandai and instead of fearing the curse he accepts it and gambles his arm passing its test. Enma which behaves like a cursed blade had to have its hunger for excessive ryou quenched zoro going all out with his haki even though it would have killed him made him pass the test...multiple times zoro has used enma in egghead and enma has not acted out once.
When zoro gets a supremem grade blade there will be another test...its makes absolutely no sense for you to think that when zoro gets a blade on the rank that wb,roger,shanks,possibly nusjuro that there wont be another test and his coc haki won't increase as a result of passing that test and him getting stronger.
My point is very simple you can not train supreme king haki directly
the only way to make supreme king haki stronger is for the user to grow stronger. Luffy in unlocking his awakening grew stronger therefore his Coc haki grew as well. No different than zoro imo who took it upon himself to go all out with his ryou to tame enma and in affect released his coc haki. As luffy and zoro grow stronger they will continue to increase there coc haki as for how oda will have luffy do it im not sure but for zoro its fairly simple... give him a supreme grade blade and thats assuming he doesnt just make enma and wado black and raise there rank i guess.