Yeah I think Palpatine’s plan is a worthy discussion to have too.
At one point I considered a potentially option could be something like this:
Palpatine knows Kylo wants Rey (everything with Snoke proved that), so when they meet on Exegol he tells Kylo, “You shall rule all the galaxy as the new Emperor… and Empress…” This gets Kylo to lower his weapon and listen to what Palpatine has to say. And maybe he even tells Kylo his plans to possess her, saying it is the only way he can have her. But Kylo doesn’t want Rey to lose her soul, so he does what he can to prevent her from going to Exegol. Maybe he knows the healing abilities of the Force dyad at this point, or maybe he doesn’t.
Alternatively, and sticking closer to the theatrical, this is another way you can do it:
Palpatine, whose experiment with immortality seems to be slowly failing, offers Kylo Ren to be his successor, maybe even telling him that he has groomed him for this role. That it is his destiny.
But to prove his resolve, he has to kill Rey. But Kylo has had a vision of Rey on the Sith throne. He know Palpatine isn’t telling him everything, and it’s true. Palpatine sees Rey and Kylo fighting as a win/win scenario. Whoever doesn’t die, he can seduce and possess. Palpatine just isn’t aware that their Force bond has the power to actually resurrect him. This basically how Ascendent has it I think, and the the theatrical film as far as I recall, just maybe not as clear as it could be.
Another thing I find interesting is reading the leaks of an earlier version of the film. It seemed like at one point in production, Palpatine was going to appear very weak/frail when Kylo encountered him, maybe even on his death bed. Palpatine was going to tell Kylo about the dyad, and that he wants Kylo and Rey to rule together as a Sith power couple basically. And it seemed that Palpatine was aware that their Force bond had the power to resurrect him (kept that info form
Kylo obviously), and bringing them both to Exegol was his goal from the beginning. I’m guessing they chose not to go that route because they didn’t want Kylo to just be following Palpatine’s orders, or having Palpatine tell Kylo to bring Rey to Exegol would parallel ROTJ too much.
I guess another issue you have with Palpatine wanting Rey to come to Exegol is that you’d think if Palpatine could speak to Kylo in his head, he could basically telegraph to Rey where she could get a Wayfinder in order to come to him. At least by going with the option of Palpatine wants Kylo to kill Rey, you can argue he wants them to fight each other in order to determine which would be the stronger candidate as his new vessel/successor.