I think Raiton users can cancel out ration used against them. Bottom right
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Sasuke only used his own Raiton to defuse the Raiton Katana that B stabbed him with. Completely different from matching or overpowering an offensive attack with the power of Chidori or Raikiri.
Which he can't hold for very long periods of time, something that Kakashi can easily exploit. With the exception of Kirin, Kakashi can prevent himself from dying from all of Sasuke's tactics with practically the same means a sick and near blind Itachi did. So I don't see how he doesn't outlast here. There is no way base Hebi Sasuke is matching Kakashi in anything given his war-arc buffs. Especially when he couldn't do so in front of a heavily impaired Itachi, with the intentions of allowing Sasuke to win the entire time. He'd have to rely on the CM in order to contest with Kakashi, which again, can't be relied on too heavily.
Cursed Mark stamina isn't even close to a major issue for Part 2 Sasuke. PTS Sasuke is one who made it clear that he couldn't hold the 2nd level up for too long. Sasuke spent the vast majority of his fight against Deidara using the Cursed Seal level 2 anyway. Kakashi goes down long before Sasuke reaches his limit.
His War Arc buffs are mainly his stamina and his proficiency with Kamui. He's shown no speed or strength increase (no strength increase was shown at all if I'm remembering correctly) that'd make Base Sasuke unable to contest him in close combat. Mentioning Itachi is pointless since Itachi ended up using MS to fight against Sasuke, something that Kakashi doesn't have nor does he possess anything powerful enough to make up for his lack of said techniques. Not counting anything that happened in Genjutsu, the only things that occurred between Itachi and Sasuke were:
-Itachi makes handsign.
-Sasuke counters with Rigged Shuriken.
-Due to his sickness and blindness Itachi gets tagged.
-Sasuke attacks with Katon.
-Itachi dodges.
-Sasuke uses Chidori.
-Itachi dodges again.
-They both use Katon.
-Itachi is about to be roasted before he uses MS.
Kakashi should be able to counter the Rigged Shuriken and Katon with his own Suiton, but if it ever becomes close combat he gets murked.
