I'm with Brian here about shaking bees from a couple of different hives into a nuc with feed.
I personally would leave them queenless for some time, then introduce caged mated queens.
Seal the shook bees up like we did at Buds and make sure to give them ventilation.
If they seem to take to her like Bud does to hot roles, I would most likely direct release her.
You gonna move the nucs away from the parent hives?
I would, as to discourage the bees from being able to drift back to their prospective parent colonies.