I don't have a good answer, but another thing to consider for work-sharing is that all parties use the same shared-parameters and keynote txt file.
So if those 7 people are from separate companies, they have their own shared parameters and keynotes and I don't see how you coordinate that. Same issue if you have multiple disciplines from the same company.
What I've done with external (structural) consultants I gave them my model, they linked that in theirs and did their part, and i linked their structural model into mine. That is a manual process to exchange files. I had to create "fake" structural sheets to match theirs so my sheet index was correct. Not ideal, but I could use my shared parameters, keynotes etc. and they could use their system.
If all 7 architects are from the same company, it is worth to have a BIM manager that coordinates so everyone does it the same way. but with separate companies, all those are temporary relationships and each company has their own ways.
As I said, I don't have a good answer, or lot of experience, but throw in these things to consider. Best to iron out before you start the project.....
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