I also agree that going stiff to super stiff is not always the ways to go, it can be hard to know what exactly to do in all conditions as the setups on the car are not always the same so the solution is not always the same.
One thing that nobody has mentioned yet that works is if you are not at max. width yet, you can try widening the car, this works well sometimes. An example would be in 1/8th sometimes to get steering at one track you might be narrow in the front. By going to a wider width front end its harder for it to roll and also can produce a more stable car also.
Steve