Just a few changes then:
“Rey….wherever you are…You are hard to find.
“You are hard to get rid of.”
“I pushed you in the desert because I needed to see it…I needed you to see it…who you are. Darkness is in your blood. Rey…”
“You’re lying.”
“You were right…your parents were no one. Used as livestock by the Emperor’s cult.”
“Don’t!”
“The woman you called mother…she was merely a host…”
“I don’t want this!”
“…carrying a dark experiment.”
“No!”
“But she loved you nonetheless.”
(Rey sees the vision of her parents and her abandonment.)
“My Love…be brave.”
“You’ll be safe here…I promise.”
“Come back! Nooo!”
“They paid for your protection…in more than one way.”
“Stop talking.”
“Rey…I know what happened to them.”
(Cutaway to heroes capture)
“They sought sanctuary on Jakku, among the friends and disciples of Luke Skywalker. They almost made it. But your parents couldn’t escape their destiny.”
(Rey sees her parents get killed.)
“So that’s where you are.”
“You know why the Emperor wanted you dead. I’ll come tell you.”
…
“Why did the Emperor come for me? Why did he want to kill a child? Tell me.”
“Because his spirit chose another vessel, out of the hundreds his followers had created. Rey…you’re a clone.”
“You were created to sit upon the throne of the Sith, a vessel for the Emperor’s corrupted spirit. But what he couldn’t foresee was our connection in the Force. We can kill him, Rey, destroy the Sith…and bring a new order to the galaxy.”
(Removes his helmet)
“You know what you need to do. You know.”
“I know.”
…
One thing that I think should be different from Ascendant is to keep Palpatine’s line about spirit possession where it is in the theatrical version. In Ascendant Palps uses the spirit transfer threat to prevent Kylo from killing him, but that isn’t strictly needed and it may make more sense if only Rey is intended as a host to his spirit. And because we’re establishing the concept in the hangar scene, it doesn’t come out of nowhere when Palpatine refers to this later on, but it becomes a further wrinkle in how Rey must destroy him.
There is still the issue of how Rey can kill a spirit that won’t stay dead, but maybe she can do it as a Jedi with their help. That’s still a thing that doesn’t sit right with me.