If you're talking pass shooting, I would agree with Pete McMiller: use flu flus.
The difference in lead required to hit a 40 mph target moving level at 20 yards between 200 fps and 150 fps arrows is 5.8 feet (17.6 and 23.4 feet, respectively). The actual difference in arrow speed between flu flus and standard fletching is much less than 50 fps under 30 yards.
There is however a substantial difference in visibility (think tracking) between flu flus and standard fletching. Until you can correct for lead and elevation, you will inevitably miss low and behind. The ability to track your arrow in flight will greatly decrease the number of shots required to calibrate your onboard targeting computer. Even muted colored flu flus will show up well against the sky.
Hope this helps.