Most bolt on in the same fashion. a few bolts to the frame rail, usually type f bolts, and a few bolts through the pinch weld. The pinch weld takes most of the abuse.
I have built 2 sets using 2x4x3/16 box and tabs to mate to the pinch weld. the 2x4 works well, you can get in as close to the pinch weld as you can and still put a nut on a 5/16ths bolt. or you can space the box out far enough to make a real step to get in the jeep.
Any type will carry the load of the jeep with a high lift, those that grab the bottom of the frame rail are a little better than ones that have just a plate that is bolted flat against the frame rail.
And the more mounting points the better. ie say 3 runners to the frame vs 2.
my $.02.