In terms of quality of experience, the best legal MAOI SWIM has tried is tetrahydroharmine (THH).
Harmaline is the most potent MAOI you can legally get. So in terms of value, harmaline is better. SWIM prefers the effects of THH though. It enhances the DMT without adding any fog to the experience. Harmaline is a mild sedative and does make the experience a little foggy. When combined with DMT, it makes the trip stronger, last longer, and makes it a little more wild, but also more relaxed because harmaline is a mild sedative.
THH doesn’t produce the mental fog of harmaline, and it’s not really a sedative like harmaline. Like harmaline, it makes the trip stronger, last longer, but instead of being more wild and slightly sedating, you have more control of the experience and your mind has more energy. It’s a very difference experience.