lol ... not really ...
Shanks and Mihawk gap in CoC can be FAR bigger than their gap in CoA
not to mention base on current feats CoC attacks are far above Ryu base attacks
Man, I am saying that we have no idea what blacken blade are capable of, and how you get there.
If it is just ryu, many more player would have achieve that. Yet oden with CoC coudnt. Shanks doesnt have it. Rayleigh doesnt have it.
This is something of the calliber of Ryuma,and Mihawk which Ryuma is know to be the stronget man in the world in his prime.
So I am just be friendly and saying calm down because there are trait that need more explanation.
If blacken blade can only be achieve because you need to infuse CoC in the sword and master it, then Shanks is not on the level of Mihawk.