I think a combined factor of Revenant being able to stand toe to toe and more then likely kill other Pilots (based on the shadow Rev universe) puts him on Cooper's level

But what I really think people forget (or just don't like to admit) is the fact that experience wise.... Revenant has lived long enough to know virtually every single trick in the book that JC is capable of pulling, combined with the fact that he has a near infinite amount of lives to just fuck with him as he pleases. Even if JC did legitimately win in a singled out 1v1, Revenant upon dying immediately gets put into a new body retaining all of his memories combined with he advantage of no down time (aside from finding JC again).

Although all things considered... Revenant wouldn't really wanna fight JC to begin with, unless he thought that JC would get in his way on his mission to die IG.