I guess it's time to stop this "August copies the 'verse GG" show. . .
---> The reason why August's copy magic will never work against BC Mages is 'cause August cannot copy their spells, this means every single magic-power this BC Team has.
Why? Simple. August can't copy magic that comes from tools.
---> Every single BC magician/demon, in order to cast spells, need a Grimoire. Book = Tool/Object
Everything of their arsenal comes from their Grimoire, since it's the primary sources of power for the Magic Knights and other mages.
In other words you can take away that "August solos BC verse GG no reeeee" idea.
The speed of top tiers of BC are supposed to be FTL. While there are contentious arguments by some others against it, I still hold on to it at least in the case of the top-tiers.