What kind of Acacia?
If it's confusa, it only will have DMT and NMT, which Mimosa hostilis also has, except Mimosa has NMT in very small amounts while Acacia confusa will have about 50/50 NMT DMT.. NMT is also psychoactive, though less so by weight than DMT, and less visual, according to those who have taken (see
nen's presentation on it).
That being said, if you mixed both together then you can proceed to vaporize it as you would with any of them separately. You might find you have to adjust the dosage a bit, using less than the Acacia extract but more than the Mimosa extract dose you would usually use.
The same safety precautions as usual for these substances will also apply (importance of dosage, set and setting, integration as well as method of vaporization ).
If it's not Acacia confusa but some other Acacia, it would depend on which Acacia and what alkaloids are in your extract.