I would definitely go with 200mg harmine. Mao must be sufficiently inhibited for any dose, and if you had harmaline, i would say yes, but harmine requires at least 150mg i think to inhibit mao. For the price that the vendor you mentioned sells harmine/harmaline i would just invest in a few grams if you have the $ on hand.
But remember, for price of buying 1-2grams of purified harmalas, you could get a kg of rue seeds that will yield 20+ grams of pure harmalas, it just requires effort, $10 in materials, and some patience/thoughtfulness to do a proper a/b/manske. You could even start small with 50g of rue, and get at least 1g of alkaloids if you are a good extractor of the loyds.
The amount of time the trip will last in my experience is co-related to the amount of harmalas you take. Its seems you can extend trips by making sure very little of the dmt is metabolized by mao. This requires re-doses of harmalas, or one large initial dose. SWIM has had 1-2hr intense mini trips with lower amounts of harmalas, compared to 6hr journeys from the same amount of dmt, but more harmalas. I would guesstimate that 200mg with be around 4hrs, but cannot speculate very well due to metabolic differences.
This is from tihkal for harmaline, its different dosages from harmine, but this illustrates how more mao can make trips stronger/longer lasting. It also shows how a threshold dose of harmaline with less dmt was more intense than a previous attempt with more dmt and less harmine.
(with 20 mg harmaline and 55 mg DMT)
"There was nothing for three hours, and then I became aware of some eyes-closed hypnogogic abstractions. The peak was slightly longer with adrenergic push somewhat more intense than what the mild psychic effects would suggest. The come-down was equally drawn out. It all was certainly less intense than when the DMT is smoked."
(with 50 mg harmaline, 60 mg DMT [20 min])
"No effects were noted except for perhaps a brief suggestion of some increase in motor activity."
(with 80 mg harmaline, 40 mg DMT [60 min])
"There was quite a bit of visual activity. The onset was subtle, but the drop-off was quick
(with 100 mg harmaline, 120 mg DMT [10 min])
"It was not until 80 minutes into the experiment that it became clear that CNS effects were occurring. Initially this was felt as clarity of detail of everything around me followed by slight time distortion. There was no loss of reality but closed eye imagery developed rapidly, later becoming present even with eyes open even though less intense. Images were initially very colorful consisting of sheets of patterns infinitely repeated with some gentle waviness, somewhat like looking through a kaleidoscope. Deliberate shifting of attention was possible at all times and although gait was mildly affected it was possible to perform any given task with concentration. There was no loss of identity or reality. Pupillary movements did not change the area of focus of my 'sight', which was surprising. Images could be willfully dismissed as desired with eyes open. Music became another world with headphones on, and 'Hearts of Space' albums easily became voyages which could be interrupted at any desired point with eyes opening. The effects began to recede at the two and a half hour point. The bright colors and patterns had shifted to less intense scenery in a calm peaceful way. At no time was there any noticeable amphetamine jaw-clenching, hyperactivity, or restlessness. The entire episode had ended at the four hour point leaving an intense feeling of happiness and amazement. Sleep was easy at five hours, and yet for the subsequent 30 hours my concentration was noticeably impaired. There were no motor problems or incoordination, yet short-term memory was significantly disrupted, requiring deliberate concentration on minor things. At 38 hours my mental condition seemed back to normal. The only criticism I might make of this experience was that there seemed to be none of the insight that I had experienced with TMA-2. This seems, however, to be a very psychologically safe experience for almost anyone and was very enjoyable."
(with 150 mg harmaline, 35 mg DMT [20 minutes])
"Initial effects were noted at 70 minutes, characterized by feelings of mild intoxication followed by significant visual distortions and inability to focus thoughts. By two hours, colored patterning was present with eyes-closed but the images flashed through consciousness so quickly that they could not be considered or analyzed. There as a pronounced sensation of being cold that was difficult to change, despite a very warm heating blanket. An interesting finding was that I was unable to visually "picture" some desired scene. In other words, I could verbally say that I wanted to visualize a forest, or a horse, or a tree, but none of these items could be brought forward. The rapid flood of thoughts quickly became exhausting and there was a strong desire to avoid all stimuli, including music, TV, or any other sounds. The effects began declining at the three-hour point and were essentially gone at five hours. I am beginning to reach the conclusion that DMT has few redeeming qualities. So far, it cannot compare with the insight and clarity of thought which occur with some of the phenethylamines and phenylisopropylamines. This potent activity at the 35 milligram level suggests that the 150 milligrams harmaline dose is highly effective as an MAO blocker."
(with 150 mg harmaline, 80 mg DMT [20 min])
"At just about an hour into it there was a rapid onset intoxication with some staggers and difficult walking. During the next half hour, there were closed-eye visuals along with nausea and a severe depression. I turned on all the lights in the room for security, although I do not like bright lights. I considered calling a friend on the phone, but then I realized that nothing could reassure me at this point. Intellectually I knew that I was safe, but psychologically there was overwhelming loss of self worth and a feeling of despair. This was a sever ego-smashing experience which might have been diagnosed as psychosis if a psychiatrist had been present. The effects lasted longer than anticipated, with a gradual return to normality at the fifth hour, and an hour later I slept. Despite the negative experience, the next day I realized that I had viewed many aspects of my life with extraordinary clarity and insight, and as a result of this experience I intend to try to change several of these personal flaws."
