I haven't tried MDMA before and I have been saving 300 mg of pure crystals for a special occasion.
I plan on doing it at Newyear, sharing it with a good friend who has done a lot of pills earlier in her life.
I plan on doing 100mg first followed by 50mg at T+60-90 min.
My question is, if you would recommend adding 20 mg of 2c-b at T+120 min. or only do the MDMA?
Since its my first time I think that maybe I should just stick to the MDMA, but on the other hand I would also like to extend the "ride" and make the most of it, since I am not able to get MDMA again any time soon.
If its your first time then I would stick with the MDMA, the first roll you have is so amazing, I don't think you'd need anything else. I have tried the MDMA + 2C-B combo, it was fun and a worthy experience, but not that amazing.
I agree with Islander20 on this one. The first time should probably be pure MDMA.
If your friend has done a lot of pills recently (or cumulatively), 150mg (if you split your 300mg two ways) is probably not going to be enough for her. If you want a ridiculous roll, 150mg probably won't be enough for you either, but it's a pretty safe bet for a common/strong (depending on the person) roll.
If you weren't sharing, I'd say take half by itself the first time. Wait a week or two, then hit the other half with the 2C-B.
HOWEVER...if you only have that 300mg and you're splitting it in half, and only have a one-time deal, I would personally ingest as follows:
T+0:00 - 100mg MDMA
T+0:45 - 50mg MDMA + 20mg 2C-B.
The 2C-B isn't so strong that you will be overwhelmed by it. Taking the other 50mg MDMA an hour or 90 minutes later is too long of a wait, imo. The MDMA peaks won't coincide as much as you are hoping they will.
I am sure others reading will agree with me, that the first MDMA dose takes ~60 minutes to hit, and any subsequent dose doesn't take nearly as long to hit. I usually feel the comeup on the first pill around 45-60 minutes, and feel the comeup on the second pill around 25-30 minutes after I take that one.
2C-B won't do the same, i.e. you should have a normal comeup time for the 2C-B, even on the MDMA - so probably about 45-60 minutes after you dose the 2C-B, you'll begin to feel it. This is why I recommend taking it along with the second dose of MDMA, as you'll likely be peaking off the molly doses just as you start to come up on the 2C-B.
In a more ideal situation I'd say to take both of them separately, then together, but if you have very limited resources, as you say you do, then I would
personally do a nexus flip. 20mg 2C-B for me was a bit underwhelming personally, but I am a psychedelic hardhead, so that's just a bit of personal info.
Just my