A lot of really solid info. The fact that you can bring people you've recruited, in particular, is extremely useful information and I'm going to try doing that my next run. I should probably get the command tree just so I can keep them alive until after the elevator because god that sarcophagus fight is nasty, I hate those.
Viewing post in Prisonner/Servant Relationship
I noticed that later when I got the offer to train trainee mages and started recruiting ALL of them for my staff. Now, the only thing I'm not sure on is how to bring prisonners out of the collection so I can lock them into stands, right now only the staff are doing that automatically with the prisonners selected for the struggle snuggle cuddle lounge.
If you're having trouble keeping your allies around, one thing any PC can do to revive an ally, even without any skills, is to lock them in a stationary restraint, then unlock them. Swap them repeatedly until they're on the tile of the sarcophagus or the mummy's post, then interact to lock them up, then bump them and choose to pick their restraints. They'll be back to 5 HP, and able to follow you back to the Summit.
Bear in mind that they won't otherwise heal after doing this, so it's not an amazing free heal, and is instead only a stupid trick to 'friendly capture' an ally so they can be transported to the Summit, but that'll still get you some extra Servants that you might've otherwise abandoned to their fate.