First, acquire a follower. I use Mjoll, it shouldn't matter who you choose. Then acquire a horse and dog. You now have 4 outside/3 inside. Do the main quest until you reach the pint where you are supposed to escort Esbern and Delphine to the Sky Alter, or whatever it's called. This gives you 6 out/ 5 in. Esbern will summon an atronarch when battle starts, so +1. You can summon an atronarch, so +1 more. There is the 8 out/7 in I had this morning.
So the question that could give you 9 out/ 8 in, can you summon the spectral assassin and an atronarch at the same time? If not, a staff or spell that raises dead/zombie would work, but you have to wait til someone dies.
I believe you could walk around with this crew until you continue the MQ line, and take Esbern and Delphine to the temple. You could potentially finish the other side quest lines with this whole crew, except the parts where "your follower can not enter here" interferes.
Thoughts? Holes in the theory?


