Hi starway6,
How did you prepare your tincture ? If it is just straight ACRB goo, then it would probably be best to convert it to a salt. Salt's are supposedly better absorbed via the mouth. I produced my tincture using a variation on the q21 tek using sunflower oil as the solvent and back salting using vinegar. It leaves me with a solution which when reduced is a deep orange / red color. I put the liquid in a aromatherapy oil burner over a candle to reduce the fluid down to a minimal amount, till residue started sticking to the container.
This time I only used about 9 drops in total. 2 rounds (6 first then 3 later). It was not at breakthrough level, though based on what happened when I added the other 3 later, I would expect that in order to breakthrough you could just keep adding more every 10 or 20 minutes till you do.
It will also depend on how much harmala you use. I don't have a scale, so I just guestimated my dose, based on how much rue i used to prepare it.
It burns a lot less than freebase, though it still left my mouth a bit raw and sensitive for 2 days, so am going to try adding something else to the mix to reduce the burn more. Maybe some coconut cream, as I see from another post someone using that for nasal drops.