Kun's raw force abilities, Kun's superior sith knowledge, Kun's dark teachings of the ancient sith that died with him, Kun's superior lightsaber abilities. Bane doesn't have a prayer of winning although this won't exactly be an easy fight for Kun.
Unsupported. I'm not trying to be a dick by pointing that out, but its true, and I've already made a case for Bane being superior to Kun in all of those fields.
Wait, his amulet blasts are useless against Bane? AHAHAAH Right. Wouldn't tear through the orbalisks but would tear through a sith wyrm and a Massassi temple? Good one noobaris. And no, all logic points towards Kun pwning Bane, while your( and you're alone in this) fanboyism points to Bane.
A lightsaber can tear through sith wyrms and temple walls..yet it still can't cut through the orbalisk armour. You can't really get cutting power beyond a lightsaber, so I'm thinking that it's safe to say that nothing can actually cut straight through the orbalisk armour. And you do realise that once Kun learnt to control the amulet blasts, there's no proof whatsoever that he could still use them to the same effect as he did in the comic, and the fact that he never used them again supports that. And really, given Bane's incredible speed, and incredible strength with the force, there's nothing to suggest that he won't simply be able to dodge the amulet blasts (which the speed of is completely unknown by the way; we can't quantify it with still media) or block them with a force shield.