You'll have pretty hard time finding a solvent for pulling freebase harmalas with a good solvent. They don't seem to dissolve very easily in the standard solvents used.

Whereas, say freebase spice will dissolve freely in alcohols, aromatics, aliphatics, terpenes etc, SWIM has not found a good solvent yet for freebase harmalas.

This is why people go for precipitations from basic solutions (after having cleaned the acid phase with 3-4 Manske precipitation)