Gonna jump in here.
Embassy is fine with gold, fine without gold. Silver, gold, doesn't matter that much for embassy. You need SOME money here. 5 silver is DEFINITELY NOT a lot of silver to have. I mean, it might be a little above average for BM... but not much.
Margrave is a little better for BM than embassy. Goons is SIGNIFICANTLY better for BM than embassy, and probably a touch better than margrave. Best is probably a goons/margrave hybrid, somewhat depending on your draws. Particularly your early draws.
Possession is absolutely totally irrelevant here. What are you going to do with it? It will take you forever to get it, and then you grab... a very small fraction of their turns? After their prime turns have passed? None of their goons points, if they go that way?