This may sound out of pocket but I think alot of us have atleast need to have a semi- apology to
@Rootbeer.
What he most likely us correct on is that even though koh mode is coC related, zoro isn't always using advanced coC in that state. He sometimes is mostly just using regular coC to buff his armament haki already coated on his blades.
When the lighting associated with king of hell mode is thick and large is when advanced coC is actually being used