Net plus gross skins
We typically have 12-16 playing with handicaps ranging from 0 to 20. We have found the fairest way to play skins is taking the net plus gross for each player on each hole for skins. So, if you get a stroke on a hole and make a par (4), you have a 4 (gross) + 3 (net) for a 7 on the hole.
Thanks for the interesting idea!