My basic setup:
Front: yellow springs & sway 32wt shocks, 30k diff
Rear: blue springs & sway, 30wt shocks, 5k diff
Proline caliber sc 2.0 super soft tires on protrack wheels
Pin mod with garo's and basket

15/62 gearing on the pro 4 gives me enough low end power to make every jump from a stand still at the base.

I use the same basic setup outdoors as well with PL snipers

after the pin mod I have a little to much push and need to lower the front diff fluid (center diff is on the way, going down to 20k after that)

Once the calbers wear down a bit they provide just the right amout of traction for me to get pleny of forward bite, but sill slide around enough in turns to prevent traction rolls.