I'd recommend working with a fitter. I used to have a problem with numbness in my little toes especially in my right foot.

My first fitter used wedges, and it helped a little. My current fitter removed the wedges. They were actually overcompensating. Most brands soles are neutral. Specialized BG shoes already have built in varus (the sole is 1.5mm thicker under the big toe than the little toe). I have specialized s works shoes and don't need any additional compensation.

My toes still go numb on occasion, but it comes on more slowly, and I can wiggle my toes to make it go away.