Give them time served and horribly shattered legs.
From mid-femur to their feet.
A couple of years in wheelchairs might send the point home.
Broken femurs? You’re charitable. I’d blindfold these harridan and wrap them head to toe in muslin, place them in a fever-hot sauna in the worst part of town, turn off every light, barricade the door, and wait....about eight hours.
After that, then I would come back and shatter their femurs.