Listen, Naruto is a shonen and in shonen the editors will not tolerate the writer opposing shonen policy which is teamwork, that's the reason why Naruto had those guys helping him against the villains, it happens in every manga since it's a message to teach the kids to work together if they want to achieve anything, one more thing is that whenever Naruto has people help him he relaxes and doesn't go all out it was stated before, unlike him going one-on-one where he would be completely focused on the fight and would go all out, he already countered Kamui with his plans but he wanted to show Obito that teamwork triumphs so he incorporated Kakashi in it, doesn't mean that Naruto couldn't have handled Obito alone, he didn't ask ****in' Kakashi, Bee and Gai to come they meddled on their on cause they're ****in' annoying. Naruto could've handled him alone even without Kakashi's Kamui and intel on Obito. So Sasuke will have no problem dealing with him