Kirin is almost useless, because it requires so much set up and you apparently only get one shot anyway.
Now this Chidori mixed with Amaterasu sounds interesting, Perfect Susanoo is inevitable, and hopefully his Fire Release gets upgraded.
This all goes to my Sasuke joins Madara theory because who better to teach Sasuke then a EMS and Fire Release pro.
Or there is a time skip before Naruto and Sasuke fight.
Giving Sasuke power ups is tricky, Naruto is going to win the final fight (its impossible for him to lose just because he is the main character), however a good fight needs to make us doubt it, Kishi has to make Sasuke strong enough to doubt it and keep us guessing so we aren't really sure until the fight is over.