A hard light just means don't use the soft box

You might use just the unadorned flash with a lower power or at some distance. If the light that's generated seems too hard, try shooting the flash at the small bounce and using the bounced light. The idea is that you want the light source to have a much smaller area than the big area you get with a soft box, and you want that light to be highly directional instead of spread out.
You say a "hard light rear" but I've only been at this a few months, so what type of light are you referring to?
I have a big and small bounce.
Thanks.