You're covering a couple of things, so let me try parsing...I’d have to defer to someone who understands civil suits better than me.
Is there a chance the women all accept a negotiated group settlement, similar to a class action suit, since they have the same attorney?
Would Woman A also testify in Woman B’s lawsuit to establish a pattern of behavior?
All the women can agree to a settlement. It would be 22 settlements with the numbers agreed upon, likely the same or simliar NDO, and similar language beyond that. So, while it would effectively be a group settlement, it would not technically be so.
Pattern of behavior testimony is going to be contingent on the facts, so I can't give you a complete answer there. Admissibility will depend upon how the judge is interpreting things.