Naruto mid-high diff. 11 KCM clones, all essentially kage level, all fight against Sasuke. The toads
more or less counter the snakes, and any imbalance in the snake's favor normally is countered by
Naruto's advantage of having Ma and Pa with him and one or two clones helping the toads
spamming giant rasengans, freeing the toads to help him.
Sasuke isn't taking out 11 kage level clones and Naruto himself quickly enough. Naruto's immense speed
and reflexes with KCSM prevents Sasuke from being able to kill Naruto without utilizing his MS powers.
Naruto can last hours like this, while Sasuke can last like what, 30 minutes of spamming MS before going blind?
Naruto outlasts if Sasuke uses MS and beats Sasuke down if Sasuke tries to conserve and use 3-tomoe
since a kage level clone + Naruto himself will be able to beat down Sasuke even if he has this lightning armor,
which should only make him on par in speed with Naruto, not outspeeding him.
I'd also like to note that the raikages had bijuu level reserves to hold lightning armor up, and Sasuke before
EMS certainly had less chakra than them, making this lightning armor drain him even faster.