I would be curious to see how piston hole area to hole quantity plays out. Is it only the area that affects high impact dampening or does the wall area from a difference in number of holes also play a role. I've generally just stayed simple in this regards and always run the same number of holes front and rear but only changed hole size. And oil too obviously.

I don't believe that there is any one perfect dampening ratio but I do believe there to be a fairly narrow range to stay within. This again is based on hunch from observation rather than scientific method.