Can’t find the proper study, but here’s one along the lines of what I was looking for.
The one I was looking for studied beneficials in common commercial mixes, and found that in their test the trichoderma outcompeted everything, instead of just the pathogens.
So i take that to mean if seeds are planted in a sterile media with the rhizophagus irregularis / glomus intraradices it can develop the relationship we want, in peace.
Then when transplanting from the solo cups, inoculate the new media with the broad spectrum of beneficials for all the environmental controls