In my experience, the yellow bottle of HEET (methanol) works the best.
You can get them to dissolve in ethanol (everclear, moonshine) but it takes a little more work.
So far these two are the only solvents I am aware of that work with freebase harmalas.
Xylene might work but I would never recommend making changa with xylene.
Convert a melodic element into a rhythmic element...