I would use Mullein, maybe add a little Pau D'Arco to it. Mullein is so light and fluffy it soaks up the extract evenly and smokes really well. I can get Mullein at the health food store for cheap. My Changa I have now is from some Aya leaf and Passionflower I soaked in alcohol, I guess you could loosely say 10 x and a half gram spice to a half gram of mullein.
Toadfreak!
Travel like a king
Listen to the inner voice
A higher wisdom is at work for you
Conquering the stumbling blocks come easier
When the conqueror is in tune with the infinite
Every ending is a new beginning
Life is an endless unfoldment
Change your mind, and you change your relation to time
Free your mind and the rest will follow