I ran mine at 4 clicks off soft on the street but it varied from track to track as to where I ran them. I also made sure that the springs matched the type of driving I was going to be doing. Remember the rear end is going to be lighter than the front normally and I had my car balanced at 51 front 49 rear. Also used the scales to make sure each corner was set right before and after a hard run. And the weight of the car has to be considered if you are going for the optimum set up. It is really hard to give a set up that will work for all drivers. You have some good suggestions on where to start and then you will need to work it out to suit your style of driving.
Ron