That’s pretty goddamned great, nice work!
For me, “at last” would work in the context of “you’ve finally shed your last burdens, snoke is dead, skywalker is dead, and Rey has left you behind.” Personally I can’t quite hear it as it stands (I was going to say it would only work subtly until I realized you’d already put it in there).
However, I’d be fine with this version as is.