I've never had salsa slip in a cam cleat. I like MLX, and it's a blended core, I'm using it form my mainsheet, but the salsa works very well as a traveler line.
Tenex, if it works for Stumble, than that's fine, I would never spec it out though. Regatta lite stretches, a lot, and doesn't last that long. Its fine for runner tails, but not much else.