What it says on the tin, I guess. I know there's a fair bit of Joe/Nicky/Booker out there but it's not really my thing (not raining on anyone's parade, just a personal preference) and there are so many other possibilities. Andy/Quynh/Lykon shenanigans back in the day? Andy/Quynh/Nile after Quynh returns to her family? Joe/Nicky/Andy after losing Quynh, and all the baggage that entails? Also would be totally on board with poly-v Joe/Nicky+Joe/Andy!
Poly Guard