Completely understand having a problem renting demo skis. That's why I bought the Rossi Attraxion 8 back in 2010 even though at 75 underfoot it was a bit narrow for trips out west. I was an adventurous intermediate at that point, and having my own skis even for days with 4-5 inches of fresh snow on groomers was nice. I'm petite, so finding demo skis that were short enough was difficult back then, especially during late season.
For what it's worth, I don't like Volkl skis in general. Too stiff I guess. Now that I'm a solid advanced skier (Level 8 of 9), I can bend Volkl skis but would never buy one because it's not worth the extra work. I've demo'd the Chiara, Yumi, and Kenja on short Mid-Atlantic slopes. That said, I know plenty of women who love either the Yumi or Kenja. They tend to weigh more than I do or are 4+ inches taller.
Haven't been on the Glory 84 long enough to tell much of a difference from the Temptation 84, which I checked out the season before. When I demo in the Mid-Atlantic, I only take a couple short groomer runs (2-3 min) before switching out skis. Only reason I didn't buy a Temptation to replace the Attraxion 8 was that I decided to get a ski in the Head Joy line instead.
For CO and UT, you may want to consider going a little wider since she does go off-piste. My all-mountain skis are Black Pearls, 88 underfoot. Don't hold as well on frozen groomers (late season early morning at Alta), but I was skiing the BPs in 6-8 inches of fresh powder before I had much experience with powder days. Now that I've improved my skiing, I can ski the BPs in 12-14 inches of fresh just fine. Although I usually rent something around 100 underfoot like the DPS Nina 99 or Nordica Wild Belle. The surprise during my last late season trip was the Atomic Vantage 90W. Holds really well on hardpack (for UT) groomers.