This thread has tons of great info,,,,,,,,,and tons of BS,,,,,,sort through it and you will be glad you did.
"how to find the center of gravity on your rig", "instant center", "roll center", "squat and anti-squat", "Horizontal and vertical link seperation",,,,you'll need to understand these to understand how to set-up the suspension.
As far as rockcrawler 4 links,,,, it's still being prefected(and always will be) so there is not really a simple "this is the way it's done" answer. After re-doing mine a few times(and years of researching about others) , this is what I am using now and it works as good or better then anything I seen. It's a double tri, 4 link. The uppers are are parallel with the ground with 32" of Horizontal seperation @ the frame and 4" @ the diff. The lowers have 14" at the Tcase output and 36" @ the axle tubes. The uppers are 34" long and the lower are 32" long. The vertical seperation is 6" @ the frame and 11" @ the axle. With this I have very close to 150 % anti-squat, no rear steer, and no "jacking", the axle does not try to "walk " under the rig during articulation, It always pushs the rig forward. I'm very pleased with it now and most likely do the same setup for the next rig.