If we're talking without access to the World Between Worlds, then Palpatine wins with medium to high difficulty just because he's more powerful with the force, knows more techniques since he lived later, and because he should have knowledge of what Vitiate did and who he was, etc.
If we're talking with the world between worlds, then Vitiate is screwed.
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
I almost feel like he has an innate ability to channel the Force in its most raw/pure form, without an obvious alignment to either side(ie. maintaining a balance of light/dark)... Kind of like a youngling: https://i.imgur.com/thSm1lx.jpg
Seems like that might explain how he was able to do things like unlock the Jedi and Sith Holocrons and open the portal to TWBW. /shrug
Anyway, I've always felt it's possible that Ezra has been helping Thrawn and the Chiss fight the Grysk(and perhaps some of the other terrors in the Unknown Regions) during the time he's been absent. After all, right around the time of their disappearance in the Rebels finale, Thrawn made it explicitly clear that the Grysk were ready to launch a full-scale invasion of the Empire/galaxy... That invasion obviously never came to pass(at least by the time of the ST), so it must have been prevented by *some* sort of unforeseen intervention. /shrug
__________________
"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
Registered: Jan 2020
Location: Chiss Defense Fleet
Would be SO badass if it were revealed that Ezra had been fighting in this MASSIVE war in the unknown regions for a number of years; especially if he were fighting alongside Thrawn and the Chiss Ascendancy.
Bleh. The light side is the worst thing the EU invented. The Force is supposed to be balanced by default. The dark side is supposed to be unnatural and the cause of the inbalance.