I try to always jack one side at a time and get a jackstand directly under the spring, or as close as possible. If you have the capability/tools, lift on the frame or at least get it high enough to put stands under the frame. I end up with two tall stands under the frame and two more under the axle. And another thought, I don't pull or tow on the axle. I figure out a way to pull on the frame. I saw an axle bend once, under some very extreme conditions and under the supervision of some very questionably skilled characters, so it is possible to bend an axle. Also if you look int he manuals, bending the axle is the way to adjust the alignment.
My way takes longer and requires more work and crawling around on the garage floor or driveway.
