@Saraz,
Sorry, but I couldn‘t help rolling my eyes when you asked for a “one-ski quiver” and immediately you were told you needed a quiver. LOL. They mean well, but you didn’t ask for that, so....
Keep it simple! If you love the Core, get the Core. Maybe the one narrower than the 93. The Ripstick is a similar, albeit slightly softer, ski that is super fun and light and versatile. I ski this ski and LOVE it (east coast).
Don’t get hung up on the right/left ski that the Ripstick has: I’ve skied them reversed twice, and I could still turn them just fine. They just didn’t have the ”auto-turn” feel when the skis are on the correct feet.
You know what the Core skis like and you like it. Great! An awesome choice for your needs. If you find a better deal on the Ripstick, it’s gonna be similar; maybe a bit softer but still good performance.
I can’t speak for touring bindings, but I do see a lot of Shifts at my local resort, where there’s no touring. Obviously they’re trusted for the downhill.