For a younger horse that I was hoping to fully rehabilitate, I'd use an approach that would properly treat the problem & help the horse become stronger, not just the symptom.
I would be looking to get her feet functioning well & well balanced. It depends on your environment as to whether she's best bare I reckon, but given that she's been a bit sore already, guessing she would be best in boots for work, perhaps with frog pads for now, esp if her heels are high. I'm guessing that the sorer hoof may be more upright/higher heeled than the other?
Evidence suggests that it is toe first landings that do the major damage to joints, including in the navicular region. Domestic horses frequently have underdeveloped caudal regions(heel/frog/digital cushion/lateral cartilages) which causes them to 'tippy toe'. Therefore it's *comfortable* heel use, allowing proper function & development of the heels which enables 'curing' 'navicular'.
If the horse has articular ringbone, that could be due to the same factors, though once that process has started I don't know about the likelihood of 'curing' it.