Kelvin, I imagine Luna is able to provide the mentioned defenses for Bridle Shores. Do you have any actual problem with any of it? Your characters are totally free to decline Mystic's offer if they wish, though I kinda doubt they will. I imagine they're willing to use anything they can get.
I'm mainly just mentioning her in the off chance I ever bring her back. If I do, she'll end up significantly different from the way she was before. She was kinda nutso herself, and I imagine her and Faithful song are currently receiving some much needed counseling. This will have a much better effect on Mystic than it will on Faithful Song, the latter of whom it'll probably do two things for.
"Jack and ****. And Jack left town."
Because I never pass up a good opportunity to quote that line.