This would just be a one-word cut, but I wonder if Palpatine could just say, “I am the Sith!” and you could hide the cut with lightning flashes. Basically, getting across the same sense of entitlement and ego Palpatine has as his “I am the Senate” line does.

And in response, Rey could still say, “I am all the Jedi.”

This might be more appropriate for the whole “more of us” theme TROS has going, and Rey being alone vs having family and mentors she can depend on, whereas all Palpatine has is himself. Basically, no one person is strong enough to take on when everyone works together.

I don’t really care for the lines at all, but I feel like this reading makes more sense when you look at it from that selfishness vs selflessness perspective, which is an important theme for Star Wars.