Ha ha, this is a topic I find quite interesting...

If I were you, I would CERTAINLY start with the acacia simplex. It has what in my opinion is a very exciting alkaloidal profile, and plenty of it if I remember correctly. As long as you don't mind experimenting with NMT, an acacia simplex extraction would probably yield a very exciting variety of jungle spice*. You could dry the bark, powder it and substitute it for MHRB in most teks without issue.

The delosperma would yield mostly 5-Meo-DMT, at this time of year entirely yield 5-Meo most likely, and IMO 5-Meo is a little scary sounding (haven't experienced it, though).

The phalaris is definitely a good one to work on if/once you have a little more experience with the extraction process, and of course the main problem (to my knowledge) is the possibility of gramine being included in the product.

*used in this context to simply mean a full-spectrum mix of alkaloids of which DMT figures predominately, all you jungle-spice terminology police out there!