I usually run 50 wt in back, 40 in front. I've got all my pushrods in the lowest setting and the springs in the rear are cranked up about 1/4 inch to set the ride height. I've had good luck using the middle a-arm holes too, but I have cvd's with a true-track so my dogbones can pop out if it's set higher. Another thing that people sometimes overlook is 'sag'. Set the truck down gently and roll it a little without pushing down or pulling up on it. It should sag a little under it's own weight.
I run about 30 or 35 in my front and 25 or 30 in the rear on my maxx...I also lightened the spring load adn took out any preload clips.....softer suspension will let you stay stuck to the ground easier but you will bottom out on big jumps more....