I'm looking to upgrade to more epic gear, and PVP gear is a nice parallel means of doing so while sitting on Nightmare lockouts. However, PVP gear is throttled by a limited acquisition currency: Black Marks of Venice. I know that I can get these by capturing a facility in Fusang every half hour, or by winning in El Dorado or Stonehenge.
What I don't know is which of these three gives me the most black marks per unit of time. For the sake of determining what's most efficient for me, (since I understand mileage may vary based on a variety of factors), you can assume that I'm bad at pvp and uninterested in improving much, and that I am playing on a faction/server where I can reliably count on 'my team' to win most PVP matches thanks to population imbalance in our favor. Thus, solutions that maximize the reward for group success as opposed to individual contribution to that success are ideal.