Hi CataractSurgeon,
Properly vaping freebase harmala alkaloids has turned to be one of the most difficult and wasteful way of administering them, even if the dosage needed is minuscule.
They seem to have a high vaping point, really close to the burning one. In fact they are perfect for changa, where you let the herbs catch fire and then slowly combust them with a controlled inhalation.
As Voidmatrix said e-juices aren't a good option because of the poor solubility of harmalas in pg or vg.
The best ROA I've encountered 'till now may be intranasal (start reeeeeally small [5 mg/nostril], wait 30/40 min and go up as needed) or sitting in a closed room near some burning rue, inhaling the smoke and the smell in the air for ten/fifteen minutes (less controlled, you have to experiment with it and learn to feel it), or sublingual (but I tend to swallow so I don't like it) .
I think these may be less damaging ways of using them as sometimes i've coughed blood from my throat after smoking harmalas enhanced herbs.
Can't give you exact dosages because I may have reached a high reverse tolerance with rue, so I need a really really small dose to feel it.
Furthermore, we're different organisms, so it may have a different effect profile for you.
