Try listening to these new lines in sequential order - it gives you the same effect as being in the scene itself, minus the music. If somebody wants to help incorporating it all into the scene that would be awesome (I think the Reddit OP used a slow-mo effect to extend the scene):
https://drive.google.com/drive/folders/1k4pgQCk0wujIFGglUndWDKaTfEoSzkwc?usp=sharing
EDIT: The line I’d like Luke to say to Ben on Exegol would be “Choose love, Ben.” Because losing somebody you love (or fearing it) will usually make you angry. It’s only because he chooses love in the moment, true power, that he can save her, unlike Anakin with Padme. Here’s how that would work - https://drive.google.com/file/d/109i7N-nXjq_YdYVM7nziM2ER2R7MO46j/view?usp=sharing