I think a group of all Rank 1s would look a lot like the the interplay between Danaerys, the two Baratheons, and whats-his-face out in the Kraki islands... It would be a lot of PvP, but not as much *direct* PvP as one would expect, I think. I could see it being a really interesting game, but as a narrative it would be a much more epic story than a group of 3s or 7s.