First thing to do is to remove the kit (silver!) springs from the front, they are way to soft and replace them with the zx-5 (silver!) #70 rate (W5181-09).
At the rear I would recommend the light green spring #75 rate (5181-75).
Pistons should be the largest 2 hole at the back and the smaller 2 hole at the front.
Associated 30wt oil rear, 35wt front.
Outside holes on the wishbone front and rear seems to work best for high grip tracks, but you can customise shock angles and down travel to suit the conditions. Many people are running the atomic carbon rear tower to get the shocks more upright, personally I run the stock tower.
The most important thing i've found in the RB5 is weight distribution, i have always run the batteries in the front poisition and added extra weights to the front end.
As a fine tuning I have removed 1 spacer from under in the front inner camber link ball stud to get the front end to roll in a bit more. Makes the car a bit more aggressive.
I think one set-up will suit most astro-turf tracks, there are different types of astro-turf but normally all that is changed is tyres. So for very high grip astro maybe mini-pin rears and stagger rib front, for less grippy tracks mini-spikes all around.
By the way your track looks very smart!