Round 1: Exar Kun and Darth Sidious win.
I think Exar Kun has demonstrated his worth enough with the lightsaber, on top of the fact he is armed with a double bladed lightsaber never seen before by either of these Ancient Sith. Sidious, while I don't think he's kept up with his saber skills, is still a formidable opponent defeating three Jedi Masters in seconds, and they were all described as "four of the Order's finest swordsbeings".
Sadow has never demonstrated any impressive dueling abilities, and neither has Ragnos. And so, based of what we see, and is logical - Exar Kun and DE Sidious take this.
Round 2: Exar Kun and DE Sidious
Since this is Force powers only, I'm assuming it's not including their technology (amulets, sceptor, etc.), so Sidious' Force storm clearly would own Ragnos and Sadow - among his other techniques (Morichro, etc.), As well, Sadow and Exar Kun both know Sith magic and alchemy, but Exar Kun also killed Odan Urr with the swipe of a hand, so I'm inclined to say that Exar Kun and DE Sidious win anyways.
Round 3: Exar Kun and DE Sidious
Clearly, since Exar Kun and DE Sidious won both Force powers and the lightsaber battle - they should win this. Again, it's just adding up all we know about Sidious, who seems to be the most superior in the Force here, and Exar Kun, who seems to be the most superior in dueling abilities.
Round 4: Exar Kun and DE Sidious
I assume this isn't including Ragnos' sceptor? Either way, Kun has shown us more abilities with Sadow's amulet than Sadow himself (doesn't necessarily mean he's the superior in using it though), and I'm going to say that Exar can hold off Sadow with his own amulet anyways, so I'd say Exar and Sidious win, though this battle will be more difficult than the others likely.
Originally posted by Escape81
Here's the problem: I wasn't kidding.
LOL. 😆
But you should read Nai's argument about the fact that he knew the technique otherwise he wouldn't have put it into his scepter.
Nai was saying he'd have to know how to use the technique for him to put it in his sceptor, right (I only skimmed through it)? How does that make sense? Can Sadow cause solar manipulations without his ship? Can he shoot beams out of his ass? Can Exar Kun trap life energy without the sphere he made?