Like us on Facebook, follow us on Twitter! Celebrate another year with MH and read our yearbook.
Manga News: Check out this week's new manga (7/21/14 - 7/27/14).
Forum News: Visit new sections for Nisekoi and Kingdom!
Yes, he probably has, but that still doesn't mean he'd win every time.
I think Kaji having a higher win percentage isn't likely to be the factor since No.5/6 seems like it was originally a Doubles slot, and the ranking and stats of Hakamada/Ban/Date suggest Doubles partnerships come before abilities imo.