This is a postscript for my last response that will serve as my final conclusions on this debate, and I'll allow you to, in turn, finalise it. Since this argument has basically run its course, I will conclude my points and add a few more to both further bolster my overall position and reinforce my already existing points.
[img]https://static.tvtropes.org/pmwiki/pub/images/darth_plagueis_7.jpg[/quote]
Plagueis is roughly equal as a Force user and lightsaber duelist to TPM Sidious. It would be marathon to go into listing all the evidence for this, but this debate provided by JKBart is more than sufficient for your perusal should you wish too (note that JKBart won overwhelmingly here):
https://comicvine.gamespot.com/forums/battles-7/tpm-darth-sidious-wollfmyth209-vs-darth-plagueis-j-1638510/?page=1
If either of them had an edge in an all-out fight, it would be marginal to moderate at the very best. Note that Sidious attacked Plagueis when the Muun was extremely drunk and sleeping; in fact Plagueis didn't even go "all-out", in that he was perfectly capable of erecting a barrier against Sidious' lightning, but instead chose to play with death, and regenerated his body's midi-chlorians faster than Sidious could kill them. This is despite Sidious drawing into the Force more than he ever had in his life. This is significant because:
(1) Sidious had participated in deep meditation with Plagueis in order to shift the net alignment of the Force in the galaxy to the Dark Side, and Sidious is confirmed as drawing deeper than he ever had for his lightning, which is > the power he drew on in his meditation to shift the balance of the Force in the galaxy;
(2) Sidious has greater Force potential than Plagueis;
(3) Plagueis is heavily intoxicated while this is occurring.
In the unlikely event that Dooku was able to attack Plagueis with lightning whilst the Muun was distracted, Plagueis would be more than capable of erecting a barrier or regenerating his midi-chlorians. There's no reason to believe that any of Dooku's lightning feats are > TPM Sidious drawing further into the Dark Side and his own potential than ever before, including shifting the Force in meditation with Plagueis. If Plagueis was highly intoxicated able to match this feat from TPM Sidious, I see no reason to believe that a Plagueis who is going all-out would not be able to throw up a barrier or regenerate his midi-chlorians against the combined attacks of Dooku, Maul and Savage, should they prove capable of penetrating his guard completely, though this is all-together unlikely in the first place.
Considering that Plagueis was able to match this feat by TPM Sidious whilst taken by surprise while intoxicated, the question arises as to whether there are any other combative applications to Plagueis' esoteric mastery of midi-chlorian manipulation. The answer is yes.
Originally posted by Darth Plagueis
"To sever the Force is to trigger a mass die-off of a victim’s midi-chlorians – not enough to kill, but enough to take a Jedi’s power. It could be that the Jedi of old knew this feat, but if so they did not understand its underpinnings. Severing the Force is the inverse of what I have done when inducing midi-chlorians to create life. It is far easier to achieve."
Plagueis was capable of killing Venamis completely, then bringing him back to life over and over again until Venamis' organs literally gave out. Inducing the midi-chlorians to create life, or to bring life back to a corpse, is far more difficult than severing them from someone, i.e. cutting someone off from the Force. Plagueis says specifically that "It is far easier to achieve." Note that Plagueis was reanimating Venamis in his lab, which Sidious noted was a powerful Dark Side nexus that could be expected from planets like Korriban; though it's difficult to determine whether Plagueis would be boosted by his own nexus, and furthermore Plagueis would not be talking about severing someone's connection to the force in a lab setting powered by a nexus, but rather if the situation arose, as he mentions the possibility of doing it to a Jedi. It took Vrook, Zez-Kai Ell and Kavar together in the Kotor 2 video game to sever a Jedi's connection to the Force without prep, and Plagueis was >>> these three Jedi combined, so much so that any nexus benefit those Jedi had from being on Dantooine would not factor into the scaling. So it's perfectly plausible that Plagueis could sever someone' connection to the Force if he wished, and without prep.
Other Force feats include:
-Could casually/with relative ease create a Force storm that could cover an entire landscape in bolts of lightning:
Getting to his feet, Plagueis extended his long arms in front of him and loosed a storm of Force lightning that crackled over the landscape, igniting fires in the grass.
-As mentioned in my previous post, a massively pre-prime Plagueis was capable of completely altering a planet's geological processes inadvertently and without much effort.
In light of all this analysis, Plagueis should be capable of gaining a marked advantage before any lightsaber contest can begin. He'd first be able to identify the strength of his opponents by examining their midi-chlorian count through the Force. He would then attempt to eliminate them all at once, and create a Force storm with both hands that would cover the entire battlefield in lightning that is =/= TPM Sidious' own lightning in potency. Savage would be taken out of the game within moments, probably charred into a husk or pushed over the pad and into Kamino's sea. Maul would also arguably be killed after some time, his force barrier would simply be penetrated. Plagueis =/= TPM Sidious >> TPM Maul. Only Dooku could be argued to be left standing. Plagueis then calls his lightsaber to his left hand, ignites it, and the duel begins.
Even if we examine lightsaber dueling, we can't escape the irrevocable fact that Plagueis =/= Sidious in lightsabers, who is >> TPM Maul. Not only that, but Maul is literally trained in whatever Sidious was taught (with the possible exception of teras kasi), and in turn, Sidious was taught everything he knew of the art of the lightsaber by Plagueis himself. Maul is heavily disadvantaged here. He's a lite-Sidious, and Plagueis would be fully capable of exploiting that with his superior Force augmentation, speed, and superior tactical flexibility and adaptability. Savage is one tier again below Maul, and if he somehow survived the Force attack, Plagueis' speed would just completely overwhelm him within seconds. Only Dooku stands a chance against Plagueis with the lightsaber. But then Plagueis has other assets. In his duel with Venamis, he is shown to be capable of integrating Force moves in his lightsaber duels, and seeing that he is > Dooku in the Force, this may be problematic. Not only that, but Plagueis proved in his duel with Venamis to be extremely adaptable: despite going up against a prepped physical equal (trained in the same arts as Tenebrous trained him in), trained in his own strengths and weaknesses, Plagueis adapted and won, an extremely incredible feat. Plagueis has other options, like severing his opponent's connections to the Force. We have been shown that, when desperate or severely injured to the point where conjuring lightning almost made him unconscious, he was capable of incredible augmented feats against Maladian assassins whilst simultaneously micromanaging healing his body and controlling his three hearts, blood flow etc. None of them could even get past his Force barrier, and Plagueis literally atomised their bodies with TK. This is, again I must emphasise, while having extreme life-threatening injuries, with two of this three hearts failing. He could also, if his barrier was penetrated, regenerate his midi-chlorians to prevent death, with only someone noticeably stronger than TPM Sidious drawing on his potential would be able to stop that. Combine this with Plagueis' amazing tactical adaptability, he simply can't lose against this team. It has the capability of being a good fight, but Plagueis comes out on top.