I normally make enhanced leaf first and then turn maybe half of it into changa, or even make two different changas with different amounts of harmalas in each batch, for a bit of variety.
Alcohol or acetone can dissolve freebase a bit, and as fathomless says, the bits that dont dissolve fully will stick to the outside of the herbs, giving a nice 'sugar frosted' effect. I think this works well as the harmalas vapourise at a higher temperature than dmt, so can tolerate being closer to your lighter flame.