Kakashi baby sitting team 10?
Don't make me laugh...The only thing Kakashi did was keep Hidan from hitting Choji along with the assistance of Shikamaru. Kakuzu attacked Ino and Choji though, and guess what Shikamaru was the one that saved them there as well while Kakashi took on Hidan.
That's not even taking in to account that Shikamaru was putting work in and helping Kakashi out, saying Kakashi did all the work is complete bull.
It's funny because Kakuzu already won in canon yet you guys say Kakashi (this is 3t Kakashi, read restrictions) wins ^^.
Oh and let's not forget that Kakashi had the upper hand surprise attacking Kakuzu and destroying the earth heart (?).
Did we also forget that the fire+wind heart combined stomped Kakashi? Because I believe that's what ended the fight for him.
Kakuzu > 3T Kakashi Mid difficulty.
War arc MS Kakashi > Kakuzu High difficulty.
Kakashi is conservative and only uses MS when forced to (See: Pain vs Kakashi, Kakuzu vs Kakashi, MS Sasuke vs Kakashi).
He used MS after he lost in the pain fight to keep himself and Choji from dying, he stated he was going to use MS right when kakuzu was going to rip his heart out as a last defense, and he used Kamui against MS Sasuke because the susano'o arrow was going to fry him.
He's only used Kamui offensively against Deidara bc that was the only way to hit him since he was flying, that was also Kakashi's first time using it in battle so he didn't know how bad of a condition it'd leave him in. Offensively against Obito bc that was their key to beating him. He was going to use it against Madara (Tobi) because he was worried Madara (Tobi) was too much for him. He also used it on the Mazo because if he got fatigued Naruto could supply him with more chakra.
Instead of "Kakashi kamuis this guy right off the bat" that's not the case. People tend to fail to keep characters "in-character".
With intel Kakashi may Kamui off the bat since he already fought Kakuzu before and he knew how that turned out, otherwise Kamui will simply be last resort again.