If you go by total wins, and many supposedly involve gifts, then wouldn't your graph's basis be flawed from the beginning? I think the Kid is the best of the trio too, but when the Geek was young, his Gaburi was a guaranteed win many times. Now? It's obvious that things change as people age-just look at me!
Surrounding competition has much to do with skill, something that numbers from one measure wouldn't show. Such as comparing a little league baseball team to a pro team. If both had 70% wins over a year, does that mean they are of equal skill? Don't get me wrong, I appreciate the analysis, it's very interesting to see how numbers compare to what is viewed, and I like all the work you put in to this discussion!
I wonder how Kotomitsuki would have fared if not for the gambling sacrifice?