yes youre correct, best answer so far to the thought of sasuke vs kakashi.lol. I don't think it's just about the Lightning techs that'll decide the victor between the two. But how Kakashi counters Susanoo, Amaterasu and Tsukuyomi.
And yes, I know Kakashi will be able to counter Amaterasu and other ninjutsu techs with Kamui but I really doubt he can do it over and over again in the same battle. One use of Kamui will take a huge chunk out of his chakra reserves. So yeah. I know he's great and all but I gonna say Sasuke's got this. He's just too OP lol.
kakashi doesnt have the chakra to pull of using the mangekyo that much to beat sasuke. and when sasuke entered susano mode, kakashi basically shit his pants. he was so lucky that sasuke had not enough energy and still being tired from his fight with danzo. kakashi may be able to use the mangeyo sharingan, but if sasuke uses the amaterasu he would hit kakashi with it and burn him to death.. kakashi doesnt not have the ability to put out the flames, and as we saw sasuke use it on killa bee, it looked like it hit instantly upon his glare. so unless madara shows up and thinks its for kakashi to live on , well sorry but kakashi wouldnt stand a chance. and if it comes down to sasuke learning anything from madara i think he would learn madara's tech or ability that renders attacks useless on him... for instance "kakashi, dont even waste your time. attacks like that have no effect on me"