First off, these are the most popular(and best) compound combos.
-Jaco(or Parma) orange purple front and Jaco purple rear(For TRC, that is Plaid and Purple)
-TRC(or Parma) cyan front and TRC Magenta rear(For Jaco, that is double pink/orange and double pink)
-Jaco Purple fronts and double pink rears.(For TRC and Parma, that is Purple and Magenta)
Try to buy 28mm foams. They seem to work better.
Measure the width of the foams. Most are slightly off out of the box. Narrow them if necessary.
Stick with plaids and purples for stock. They give more then enough grip.
For 19t and mod, it's probably best to move onto cyans and magentas.
I have never tried the purple and double pink combo so I don't know where it's used.
If you are on a budget, true them down to 62mm out of the box. If you are racing competitively and have the money, true them down to 58mm out of the box. Do not run them straight from the box. They will chunk like mad.
Rotate your tires every run.
Check for coning after four runs or so. Adjust camber appropriately.
Use very stiff springs.