Bri and Kit. This was their first time together, but you wouldn't have known it based on how well they performed together. A full review will be coming.
I've seen Bri twice, and her BBBJ skills are second to none. She also rides CG like a champ. And Kit's reviews speak for themselves - she is also top notch at both. If I was forced to assign one to each task, I would put Bri on BJ duty, and Kit on CG duty. But really, the highlight of a good duo session, for me, is when both on sharing BJ duties.
And of course "specializing" in either of these items is subjective. I would think most of the well reviewed ladies on TER will pride themselves as being specialists in both these things - since it's what they do.
I also think CG is a bit trickier, because there's more variables in involved, including your personal preference. Do you want aggressive, fast, porn CG, or maybe more slow, rhythmic and sensual. I think think the guy also plays a role in the success of CG, in terms of getting a rhythm going, or more importantly, not messing up the rhythm. I'm pretty sure there have been times I've gotten over-excited on the bottom, and I just end up screwing up the rhythm.
But anyway, Bri or Kit are both great options as part of a threesome, either separately or together, factoring in both BJ and CG skills.
No surprise considering your companions! lol eom