Each of us has "magic" settings we start with, that have proven to be quite useful for us. We then tun from there.
I will on occassion use the stock set-up and drive the car as a test, but I usually end up at my "magic" settings, then fine tune from there.
I may or may not change the spring rates
Ride hieght to 5-10 mm from the lowest and raise the rear another five.
bound at 5/5
rebound at 7/7
Camber at 3.0/1.0
Toe at 0/0
Stabilizers at 4/4
Brakes at 20/15
LSD 10/30/10
From there I evaluate the cars handling and tweak from there.
Hope this helps.
Also, remember that most cars in this game have a fine line as far as horsepower.
For instance, I am faster with a 500 HP Supra, than a 1000HP Supra.