Hi,
When I originally tried a peganum harmala extract, I made it too strong and had a rather unpleasant experience. While I didn't heave, I definitely felt like if things got any more unpleasant I would.
I since then have learned my lesson and had success with far far less rue extract. It may be that I'm more sensitive to these particular compounds than some people.
Now, to answer your question specifically, we see 3g listed many places on the site as a target / usual quantity to use.
For me, I lowered the dose all the way to 1.5g. I've seen references that this is considered pretty much a minimum dose to get any MAOI/RIMA effect at all--perhaps not
expected to be effective for our purposes. Well, it sure worked
for me. As in "Wow, that made DMT-phospate very,
very available orally." The best thing about it was that I got the effect I desired,
with no nausea nor pain whatsoever.
For you, maybe something in between my 1.5 and the suggested 3g?
What I did, and for me had easily the most intense and rewarding oral DMT experience so far (granted, out of only three). Each time I've reduced the harmala extract and increased the DMT since on the previous two tries I just wasn't getting the level of DMT experience intended. Your target and expectations may differ! So perhaps "use less than you think you need, and work up" is really solid advice.
Harmala:
1. 1.5g rue seeds in 300ml filtered water, added juice of 1 lemon.
2. Soaked the seeds for 1 hour.
3. Simmered the mixture for 3 hours, adding filtered water whenever the level dropped to ~100ml. Added back in water to have 300 ml until the 3rd hour, let simmer down to ~100 ml.
4. Strained the solids out with a coffee filter. Put the solids back in the pot with another 300ml and repeat step 3.
5. Filtered & added the 1st and 2nd extracts together, simmer down to ~80ml.
DMT:
1. 50mg DMT freebase and 50 mg DMT-N-oxide/DMT freebase (presumably, it was "reclaimed" from crystal formation in the GVG using IPA + evaporation. I of course don't know how much might have been oxide so perhaps I shouldn't suggest that it was...) Now the total qty there is 100mg, which is a
high dose--but with such a small amount of harmala...
2. Dissolve the DMT in Coca-Cola to make DMT-phosphate. Used just enough liquid to do the job, don't know the ml amount. Kept adding the Coke & stirred till it dissolved.
Administration:
0:00 drank all 80 ml harmala. Tasted bad.
0:30 drank the DMT-phosphate. (Again, suggestions here are most often "consume together" or "wait 10m". 30m is possibly "too long" to wait...but it worked for me)
0:45-1:00 things ramped up. (possibly sooner, I honestly don't remember exactly--when it started, it came on faster and faster, then "boom"

~1:00 ...I think it was around this time I was entirely in hyperspace, I honestly can't tell you any time reference till about 2:00. The first point I rember even being able to look at the clock and remember doing it to see "how long was I 'gone'?" was at 2:30.
Comedown was very gradual till 3:00 and by 4:00 I felt close to baseline.
Maybe for you 3g extract with 50mg spice is a more responsible suggestion. This was the most intense (and psychically rewarding) trip I have ever had, but I can see where if you weren't ready or expecting it that it might be far too much. The peak was essentially a 30 minute (at least) version of a 3 minute vaporize hyperspce journey.