Deception
Ancient Dark Lord
So one quote of NEC now disapproves numerous quotes and implications on Ragnos being the Most Powerful of the Most Powerful?
You claim Sidious can win because?? Logically by comparing the two Sith Lords phyiscally and comparing the feats done by the Ancient Sith, i hardly put Sidious above Sadow, or perhaps even Kun.
Also that means that NEC is on par in terms of Canon with the Comics which have also said Ragnos being the most powerful of the most powerful, also most "powerful Sith Lord in history," whilst in Ragnos's time we know that the strongest ruled, we also have evidence that in Sidious's time the strongest "Politically Ruled," Sidious was most powerful, he as literally the senate that does infact make him the most powerful Sith Lord in history in terms of Politcs and the domination of the Republic.
Also that quote quite frankly refers to Sidious as of ROTS to ROTJ, why are you deciding that it also refers to DE Sidious?
History, that is also a fickle term, it didnt specifically state from Ancient Sith to DN, it stated purely the word history, but from which timeline? Ruusan? Hoth/Banes time? Frankly that quote is even vaguer than the Ominscent Narrator stating Ragnos was THE Dark Lord of the Sith, The Most Powerful of the Most Powerful.