I believe if you are going to do Buhner's protocol you should do what he says and not go out on your own. He spent years perfecting his protocol and seeking what worked in synergy with each other.
I really do not advise adding to his protocol, especially if you are just starting out.
Maybe after you have years of herbs under your belt, then you can switch things up, but why mess with something proven to be good???
Sorry PeteZa I may be misunderstanding. I thought both were part of the core protocol?