I love this! Totally does a lot to make the KoR even the slightest bit more interesting, which adds a lot. Even if it is only a few lines, I could see this adding that “Boba Fett” appeal to the characters. I like the voice a lot, too. My favorites go as follows.

The first option is my favorite, as it sets up the teeth line best.
I like the Palpatine option, to keep his villainous presence constant in the film. They have enough personal character beats in the other clips.
I liked the traitorous scum bit.
Join your father is dark and great. I like the allusions to them being his old buddies and saying Ben.
I think what how is the only one that really works there.