I think it's entirely fine that Nanase has both the Rasengan and Chakra-enhanced Strength. And I agree, KS, that use for Kage Bushin, I don't think even a pervert like Naruto would've thought of that o.o As for the number of clones, if I recall correctly, a weakened Kakashi (who is notorious for not having a good chakra supply) was able to summon a dozen clones. Annie even said that Nanase rarely does 10, since it can be assumed that it'd take up a lot of chakra.<br/><br/>As for Naruto being alive, why not? He would seem like a stubborn old man who won't go into his grave. How old was Madara before he properly died? Naruto controlled Nature-based chakra, I think that could extend his lifetime as well as having the Nine-tails inside of him.