Never used beeswax in soap and probably won't, for the following reasons:
Beeswax isn't completely liquid below 140F. Will stay more or less dissolved in other oils below that temp, but is prone to solidifying out. You will have to process pretty warm.
Beeswax is NOT soluble in soap solutions. At all. It's the very devil to remove from processing equipment (I have bees) with soap and water, really requires multiple rinses with boiling water, or better, paint thinner.
That means it's only suspended in soap, not dissolved like most oils (it's not an oil, it's wax). Very small particles, perhaps, but suspended.
It will not soften significantly in use, nor will it coat the skin well, although it does feel quite sticky.
I would use cocoa or shea butter unless you suspect an allergy issue with one or the other. If you hot process, you can insure than the cocoa and or shea remain in the soap, and they DO remain on the skin -- I use them in shaving soap, and it's very nice.
If you still want to try it, use 1% in a small batch and see how the soap works for you. Anything above 3% is likely to give you a very hard bar of soap that won't lather and may in fact be resistant to dissolving.