These pistons probably allow for one of the best suspension combinations on the market right now. These pistons allow the car to float through the rough but yet pack up on quick compressions. I've used them on the D8 for almost a good solid year with no o-ring damage.
No magic setup as I'm aware of. Install the pistons and go a little heavier than where you were. Chances are you will still need to go heavier. You will know if it's to soft or stiff. Hard to describe but trust me, you will know.
Basically sitting on a table, my buggy feels so soft that dropping it from 12 inches, it would easily slap the chassis but it wont. That soft feel with normal style pistons would be a nitemare on the track.