I would do both. Concentrate on her like crazy when it's just you two, but then let her run with the others too. You might also ask the guys to hold theirs back on a few runs, so she can go it alone. The others in the group may see something you don't.
We never hunted with less than 2 dogs until Barretta died, and my granddad was forever getting input from the guys we went out with.
I say do both.