Sage clones, Kage Bushins and smoke bombs are the key here for Naruto. SM is imo as least as fast, strong and probably more durable as Raikage with his lightning shroud up. He'd need enough Kage Bushins to deal with Darui and Shi whilst fighting the Raikage. Would the Raikage be as careless as his fight with Sasuke and present the opportunity of Rasenshuriken through tickery and at least touch him? I'd say yes and the Raikage wouldn't be able to tank the jutsu like Amaterasu so it'd be GG. Shi and Darui wouldn't be able to compete with the speed of Sage Naruto and be finished off afterwards. I believe that Naruto would be able to wrap things up before Gaara and Co. go to intercept them and head straight to the meeting. The rest I cannot be bothered speculating. I'll just say that Naruto would have obviously had more stamina to last this many high level battles and at the very least complete his objective of killing Danzou. Would he have eventually lost at the end like Sasuke? Most probably.

I know man. I keep saying this but people just look at the results and not at the circumstances. Keep telling 'emI feel like in every thread discussing Naruto's strength someone always tries to say Naruto "defeated" Pain. This NEVER happened. First of all you must take into the fact that Pain did not want to kill Naruto. That greatly alters the path of the battle. Then consider the fact that Pain had just laid waste to the ENTIRE village of Konoha. He killed multiple top shinobi including Kakashi, and he made Tsunade exert herself to the point of falling into a coma. On top of that, Pain had Naruto pinned down this his chakra bolt thing stuck through Naruto's hands. The battle at this point was OVER. It only continued because Hinata interfered and got Naruto to release his Kyuubi chakra. Then even after this Naruto was then imprisoned in a mini-moon which he broke out of thanks to 8 tails of Kyuubi power. In this case the word Kyuubi can be subbed out for "main char". Then if you actually pay attention to their meeting in Konan's paper tree, it is clear that Nagato has the ability to kill Naruto. It is only through Naruto's words that Nagato changes his heart and sacrifices himself to revive the fallen shinobi of Konoha.
Saying Naruto defeated Pain is like saying Sasuke defeated Itachi. It just never happened.