Kages
You started out pretty well, and I liked the way you used Kakashi's moniker to his advantage. At that stage, you were being realistic, and you seemed to have backed up your claims pretty well, it was a pretty decent first post if I may say so myself. Excluding your mystical palm assumption, which I'm not sure where you got that from. Kakashi is no medical nin... I also liked the fact you were able to back up some of your claims with early manga facts, good job. Kakashi's speed advantage also seemed to be on point.
Kages, overall though, your arguments were mainly centralised on speculation, and speculation alone. It seems as if you've built your argument on Kisame standing still, allowing Kakashi to proceed with your said argument. I mean, mystical palm? Not really. I also believe you could have capitalized on Kamuis' speed, and used it against Proof. It's a manga fact that Kakashi's Kamui is faster than Obito's, by quite a bit, shown where he was able to warp Naruto at near instantaneous speed. I also disagree with Kisame being held down with Kakashi's dogs. You see, I think you're mistaking Kisame for Zabuza, which is a mistake in it's own right. Kisame has been shown to break Mokuton: Stock. Considering Gai just destroyed him, and Yamato was suppressing his chakra, that's a darn good strength feat. Let's be honest here, one swing from Samehada would murder all of those dogs. I also noticed you failed to counter Proof's comments, but instead changed Kakashi's counters multiple times. Also, I believe you're mistaken on Earth walls capabilities. It's simply a technique to provide protection from head on attacks. Using it in a water dome does absolutely nothing. Using Kamui on the water dome is quite iffy. You see, the water dome covers a 360 degree radius, wherein Kakashi can only focus his Kamui on one side at a time. I believe if he were to Kamui the water dome, and if he can, his chakra toll would take a huge plunge...
All in all, mediocre post, at best.
DrProof
You began your counter-argument very well, as you were able to counter every point Kages displayed. You provided facts, manga pages, and databook pages, making your argument all the more solid.
Your arguments concerning the water dome was spot on, as Kisame is fused with a chakra absorbing tool. I also agree on the general basis of Kisame outlasting Kakashi, meaning Kakashi cannot keep copying Kisame's jutsu, as he'd be depleted of chakra rather fast. Considering Kisame's large scale Suiton techniques, I doubt Kakashi could maintain it. I did, however disagree with your kamui argument. As Kages failed to properly counter your claims though, I have no objections. You see, Kakashi's Kamui is simply too fast for Kisame to react too. Naruto, who was about to be momentarily warped by Kamui, was saved by Kakashi's near instant Kamui. Obito, the Kamui master was left in awe. But like I said, I'm not the debater here.
Winner: DrProof