100% soybean will go rancid quickly and 100% shea will have very poor lather. Is there a reason you are looking at single oil soaps? Most of them aren't very good, a balanced blend makes a much better soap.
Just remember, SB oil by itself will make a mushy bar..you need at least some amount of a hard oil to hold it together..Im not sure the beeswax will give you what you're looking for, but let us know how it goes