Do you have a probed thermometer to measure your temps inside the enclosure?

To clarify, your herpstat probe should go on the outside bottom of the UTH.

I would think about getting her another hide like that exo terra rock hide you have and only using those two. Place one right over the uth (your hotspot at 90-92*) and place the other on the opposite side (your cool side at 80-82*).

You can put the other few hides in there as well, but she shouldn't have to choose security over thermoregulation.