The main thing is that for fingers and toes, it generally does not work well to use the coils like a ring around a finger or toe. It’s better to sandwich fingers and toes (and hands and feet) between coils on opposite sides of the painful area, with the bumpy sides of both coils facing away from the skin.
I would start with our default settings:
Omni-8 (standard on the A9)
Intensity 9 or 10 (“H” setting on the A9)
Try each coil position strategy for at least 4 to 6 hours
Wear it daily for 6 to 8 hours, longer is possible.
Continue to wear it for a week or two after pain subsides to allow full tissue recovery and prevent recurrence (about 80% of the time)