Just wondering if I can put haramaline crystals with dmt fumarate in a capsule together.
Anyone tryed this?

You certainly can, but the DMT won't work because the harmaline needs time to block the MAO enzymes. They will destroy the DMT on contact unless you eat the harmaline 20-30 min before ingesting the DMT. Separate capsules would probably work fine though.

The necessity of time between harmalas and deems is controversial. Traditional use of ayahuasca does not have that time delay and works undoubtedly. We can argue only if a time delay could increase efficacy. To monitor this potential augmentation due time delay is difficult as the digestion track ROA is already something prone to various factors. Imho the speed of assimilation of the alkaloids is determining mostly the intensity, this is something that can differ from day to day, from occasion to occasion, very hard to get a handle on that.

Actually, there are signs that harmala activity could be more complicated than that. It is actually probable it would still work, although some of the DMT might be lost.

To OP: the biggest factor is in eating something fatty after ingesting, no matter what oral DMT method you are using.

I find a croissant is consistently a good idea after ingesting. Other kinds of bread do not work as well, presumably because a croissant contains fatty butter.

You can.
Now it is debatted wether or not it will be more effective if you do harmalas 20-30 min prior DMT but it would work, SOme do 150 mg harmalas 20 min before and then 100 mg harmalas with the DMT dose together.