Man, your truck is all over the place on setup, just by your RC shims alone it will have entirely too much steering and most of that is due to the back coming around because of the 8mm mod and not having enough inside shims (6mm minimum). The thing is that you need to start off with a working setup BEFORE you start throwing other things in the mix. I feel safe and saying ( and i think alot will feel the same) that my base setup is really good on outdoor tracks with or without the Cdif and 2 stage pistons. Try this setup EXACTLY, tell me what it is doing and we can go from there. This is also assuming you are running the VTS, in which case i highly recommend the Garodisc ASAP, if you want any kind of consistency . I am leaving shock oils out because i have no idea what works with stock pistons, never used them!!

Front:
1*toe in
0 camber
yellow springs
yellow sway bar
30k dif fluid (kyosho grease works best)
shock outside on arm middle on tower
24mm ride height
4mm Roll center shims
camber link on outside

REAR:
3-2 block
-2* camber
Front green or white springs
blue sway bar
5k grease in dif
shock inside on arm middle on tower
24mmride height
1mm Roll center shim
camber link on inside and #2 from the inside on hub (no 8mm mod yet)

this is a very neutral setup and works well on everything, at the very least its a great base. Since i have had this truck for over a year and a half i tend to know alot about it!! If you start here i can tell you exactly what to do to get it to act like you want. As of right now your going to get way too many opinions and you will get lost!