A lot of people are using the Yokomo blue orings with the Yokomo black bladders and the 3x1.1mm pistons. I'm running the double blue orings with thin white spacer.
As for short shocks, I ran them for awhile, but just went back to the standard kit shocks. I think the standard shocks feel better for my track conditions (low/med bite carpet). It feels like it's rolling better through the whole turn. I'll save my short shocks for very high bite tracks. This is for 17.5t blinky class.