Board Thread:Versus Debates/@comment-34436445-20180524115106/@comment-35409024-20180526023329

"Did shin attack naruto directly or did he used sasuke’s sword who happened to be next to naruto?"

Neither, he used the sword that was directly a few feet in front of his face with his line of sight on it. Sasuke was not next to him. He was directly in front of him. Naruto Gaiden, chapter 6 page 8.

"Could naruto sense that sasuke was about to stab him?" Nope, but with the reaction speed Rikudo mode grants, he should of been able to react to it. With just base Sage Mode he was able to react to the Third Raikage who kept up with him in Kyubi Chakra Mode. This means Naruto has fallen from what he used to be or he's just not fast anymore. Same chapter stated above. Rikudo eyes are shown which means he had Sage Reaction Speed. As well as the Third vs Naruto chapters, 553-555 chapters of the Naruto Manga.

As for the rest of your questions, it doesn't matter. Since Sasuke is a pretty much godly and his new sword isn't stated to be anything special, and Naruto doesn't have the healing enhancements in this particular fight.