Looking for a FFM threesome where the girls actually work together, not just take turns.  Can anyone suggest a winner?

What is your budget?

I'd say take a look at Camille Fuentes. She has a few ladies she does duos with and she's very reasonable. I've only seen her solo but She has a lot of good reviews.

She's not on TER but we've duoed together many times and are actually bi, we play very well together and travel to the city for appointments.