Doesn’t work like that I’m afraid. It is very difficult to make a formula out of thin air with herbs and the ones that do exist have taken a long time to come about by leading herbologists.
As an acupuncturist, don’t worry about making a tonic to fix your own or your patients problems. Do the basics well and go off what you know. For example, diagnosing whats disharmony is causing the kidney stones to form and working on that.
I second that. You can’t just mash some herbs together. If A does one thing and B does another, you cannot just assume combining them both does A+B. Some herbs when mixed won’t have the same effect or may even create an A+B+C effect. Where did the C come from? You need total awareness and understanding what every herb does inside the body on its own and in combination before you can even begin to think about mixing several.