Kakashi vs Tobi = Kakashi warps a Kage Bunshin and then Obito can't phase anymore. If Obito teleports himself in the Kamui dimension to defeat the Kage Bunshin Kakashi follows him with his Kamui and defeat him. Obito can use Gedo Mazo to pressure Kakashi but Kakashi is more skilled and should be able to trick him and land a fatal hit.
Kakashi vs Sasori = Kakashi dodges Hiruko's attacks and destroys it. Then he fools the 3rd Kazekage with a Kage Bunshin and blitzes Sasori from behind or using Doton underground, and Sasori's heart is pierced with Raikiri.
Pain (no Nagato) = Kakashi has full knowledge and is generally stronger now. Without knowledge and without using his Mangekyo, he already managed to fight the strongest body by far and the 2nd stronger, managing to trick and corner them with his ninja skills. Now he should Kamui away Deva, and then face the others and I think that with his War Arc feats he can do it.
Kisame = Kisame was blitzed by V2 Bee. Kakashi is so fast that he can counterblitz the V2 landing Raikiri on them. With the help of a Kage Bunshin he should be able to circumvent Samehada and cut Kisame in half. If Kisame starts with his more powerful Suiton then Kakashi kills him quickly with Kamui.
Konan = Kakashi warps her in the other dimension with Kamui.
Kakuzu = Kakashi warps him in the other dimension with Kamui.
Zetsu = Kakashi warps him in the other dimension with Kamui.
Deidara = Depending of the beginning distance, Kakashi blitzes him with Raikiri or kills him with Kamui space-time barrier.
Hidan = Kakashi tricks him with RKB and then bisects his body in multiple pieces with Raiden.
Itachi = Kakashi is slightly faster, smarter and more versatile. He has knowledge on Itachi's Mangekyo and knows he has to avoid Tsukuyomi, and he has the ways to do so; also he has a lot of more stamina. Itachi gets defeated with Kamui.
