It sounds like the whole car is too stiff in general, and the front overdamped. Instead of the car leaning into the suspension on the outside it's lifting the inside and running out of droop on the back.
I've been playing about with B4 setups recently, trying different running weight and softening/stiffening the shocks as appropriate and think I've now found my lipo setup
You should be on pins all round, staggers on the front are for wimps
I've not done a setup sheet yet, but I'll list how my car is now so you can try it...
Front
35w/No2/Silver, middle on tower, outer on arm, 24mm ride height, no droop washers
Camberlink 1-A, 2 washers on the tower, -1 camber
30 degree caster, in-line axles spaced middle, 2 bumpsteer washers on steering block
Rear
25w/No1/Silver, inner on tower and arm, 24mm ride height, no droop washers
Camberlink 1-B, 1 washer on U brace, -1.5 camber
2 degrees squat, medium wheelbase
Weight-wise I'm running the Trishbits front bulkhead and brace (55g total), and the older style Trish squat block (28g). Cells are the Trakpower Dark 5000 40c (284g).
Setup like that the car has been fantastic on every track I've taken it to, carpet/grass/astro it's been great. I do seem to be Mr Steering though so if you want to calm it down a touch the trailing axles will dull down the initial turn-in and moving the rear shocks to the middle on the tower will make the car square up quicker and give you a bit more rear end grip coming out
