I’m planning on following RL’s recommended Jannah lines because it matches up with when her face is off screen.
As for Palpatine, I think simplicity would work best here. “Long have I waited… for a worthy heir to the Sith. But Kylo Ren was weak. Empress Palpatine. You will take the throne.”
Here’s an extremely rough test of this idea (I suck at editing):
https://youtu.be/sFCtq0M8w4I?si=iF21LcwUelxgODyB
The lines sound really good to me though.