Looking at the p-bulbs, you have had a root issue for quite some time. I think what you need to consider is it worth the effort to try to save these, for it will take a few years to get them back to blooming size, if you are successful.
The hybrid is common and fairly reasonably priced. It might be better for you to get a new one.
If you want to try to save them, put them in a bark mix and secure them with pot clips so they are stable. keep them on the dry side only watering maybe one time per week and keep the pots in a shaded spot. Running them dry for a bit will encourage the roots to lengthen and search for water.