So, concerning Akuma vs Kahn.....
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I had zero doubt Kahn was gonna win. Canon wise, Akuma sank an island. At his peak, Kahn no-sold the Elder Gods' attacks, the same ones who fractured the One Being, a living universe, into 6 realms. He beat Blaze, and would've damned every realm had Raiden not reversed time.
Akuma's ace in the hole, the Shun Goku Satsu, would kill Kahn.......after billions of uses, owing to Kahn's massive soul count. The SGS destroys A soul, not souls.
Furthermore, if we allowed Asura's Wrath feats for Akuma, we'd have to include the (much maligned) MK VS DC Universe version of Kahn, who's on par with DARKSEID.
Also....
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Really? Korra vs STORM?!?! What. The. Ass. A not that OP non-comic character vs a somewhat OP comic character. C'mon man! Sword of Omens, grant me SPITE BEYOND SPITE!