I think that very often a black box approach works quite well – you just throw a big bunch of diversity on a sieve (the actual living conditions) and whichever team gets caught in the sieve proliferates.

If you short circuit the germination of spores or break dormancy, it can be tricky – see trichoderma. If it is active, it wants to eat. And Trichoderma is a pretty versatile feeder, depending on strain. D. Henzler said, that there is Trichoderma that will feed on Mykorrhizae and there is strains that rather do not. So if you start Trichoderma from compost, if it would usually not wake up, you may see your Mykorrhizae fight for their life.

The selection for the “strictly” aerobic part of microorgs keeps such a black box approach rather safe.

I completely agree, that it would be ideal to transfer healthy microbes from healthy leaves onto healthy leaves, but maybe if there is a pathogen proliferating and things are out of order, something like Trichoderma is the game changer – and it is enough perfection. I think that the whole business is just in its infancy and it is far too early to insist on “here is the path to go”. Esp. the Archaea that moderately tolerate oxygen are important for soil nitrogen metabolism – I think that they will be fine with the biodynamic stirring and splashing, but not bubbling and fine mist spraying.