The order is off if it's supposed to be reversed. Nonetheless:
1. DE Sidious
He probably wins, and it might not actually be as difficult as you'd expect. He dispatches Palpatine in DE without suffering significant injuries, and it isn't implied that he's utterly drained or burned out. And I think LotF Luke > Amped! DE Luke, seeing as how amped! De Luke just has some potential unlocked by Leia, and I doubt that potential > 30+ years of growth in both the Force and technical skill.
One could point to his duel with Caedus, but Caedus has an especially aggressive fighting style replete with h2h strikes Sidious doesn't really use, and Luke started that with a bad knee.
Sidious may try to engage in a Force battle, but even then, that isn't likely to severely damage Luke.
2. (Dynasty of Evil) Darth Bane
Luke oneshots. Actually, he could use this fodder to cheat on his recovery time and just pin Bane in place while taking a rest.
3. Darth Vitiate
Vitiate isn't his sith name. Regardless, now that he's healed from his Palpatine fight thanks to Bane's nap time, Luke can just startle Vitiate with electric judgment/telekinesis/projectiles/illusions, rush him, and eviscerate him up close. He can pull this off because he's faster than Vitiate, he's a more competent combatant, he's more powerful, and he's obviously deadlier in melee.
As this is Vitiate, his status below Palpatine is canon, and so it's tough to argue for him doing better than Sidious, given that his inferiority in other areas like dueling ability just compound upon his canonical inferiority in power.
4. Darth Caedus
He's probably a little tired at this point, although not necessarily by that much; Dooku can replenish himself within seconds with the Force, and Luke has some pretty impressive stamina feats in TUF and FotJ. Luke beats Caedus pretty convincingly in LotF despite having a bad knee and facing environmental hazzards; are a bad knee and an environmental hazzard bigger handicaps than the fatigue of facing Vitiate?
I'd say so. Luke had fought through thousands of Vong in TUF and could still take on seven slayers by himself, when one infected slayer was able to defeat Kyp Durron. He can beat Caedus.
Heck, if he gets the quick draw, he might even be able to ragdoll Caedus outright.
5. Darth Plageuis
He stands a pretty good chance of losing here from fatigue, especially seeing that Caedus tends to get pretty physically brutal.
Again, Luke's performances in TUF and FotJ make it apparent that he can fight powerful enemies for prolonged periods of time, so it isn't a given that he'll stop here. His best shot is honestly to have taken care of Caedus via the Force, which I do believe that he can do if he doesn't hold back, and then try to blindside Plagueis with electric judgment and other Force abilities.
I still think he gets the majority. Luke > DE Sidious > RotJ Sidious > RotS Sidious > TPM Sidious >= Plagueis is a pretty big chain.
6. Exar Kun
Ehhhhh he might be tired now. I'd say Luke still has a majority if he hasn't held back and has gone immediately for the kill via electric judgment + speed blitz in his previous duels. Otherwise fatigue might be catching up to him.
Again, he fights through thousands of Vong in TFU, which likely took a longer time than he's been fighting for up to this point.
7. Peak Mara Jade and Peak Kyle Katarn
He can potentially ragdoll them. Either way he's simply too powerful for this duo.
8. NJO Corran Horn
He ragdolls him and uses the spare time to recover.
9. Kam Solusar
Full power Luke oneshots.
10. Padawan Anakin Skywalker w/lightsaber
Oneshots.
So it's a matter of making it through Vitiate-Caedus-Plagueis-Kun. Vitiate probably won't fatigue him that much as the fight will be over fairly quickly, and he can probably dominate Caedus with the Force. Plagueis is a legitimate threat, but I don't think he'll fatigue Luke enough for Kun to overpower him.
So, Luke may clear if he doesn't hold back and plays it smart. If he jobs and decides to duel them while holding back like he seems to do for some reason, he dies by Plagueis.