I also had osteoporosis, pretty severe, and did 5 years of an aromatase inhibitor (letrozole). Most doctors I have had contact with use Reclast during treatment.

Prolia works well while you take it but there is a rebound problem. If you don't follow it with Reclast you lose whatever you gained and fracture risk goes up. If you are on Prolia for only 2-3 shots this is apparently less of a problem.

Do you have an endocrinologist or is your oncologist managing this?