Location: Valley of the end
Intent: To kill
Distance: 20 meters
Naruto can only go into BM mode, Sasuke has all current powers, A is in peak condition.
A can't touch him now that he has Final Susanoo...if he gets close, Enton will catch him on fire, and he lacks the firepower to break Final Susanoo.
B needs to go Full Hachibi Form to break Final Susanoo as any other forms TBB is too weak to smash it, but if he does then Sasuke will light him on fire with Amaterasu Magatama or Enton Blade or Enton Arrows.
If he stays V2 then Sasuke can beat him using multiple Amaterasu Magatama along with arrows and his Enton Blade.