This is'nt really my territory, but I think you would want to combine MMAI or MDAI with something more stimulating, because they both increase levels of serotonin, and not dopamine. I mean, this is the difference between MDMA and MDAI, simply put. Correct me if I'm wrong somybody.
It seems to me that people are combining MDAI with stimulants like MPA, Camphetamine, 2 or 4 FA, or cathinones like ethcat, Buphedrone, Butylone etc. or MDPV as you already mention. So this would probably also be a good mix for MMAI.
Combining MDAI and MMAI is probably kind of pointless.
Be sure to read up on any new chemical before trying something new, and be sure to try it as it is, before mixing it with MMAI.