I think you want to open Chancellor(!)/Silver regardless of your strategy because getting to Butcher quickly and playing it often is key, so you want to skip Develop, which also interferes with Butcher. C/S also increases the chance of getting a lucky Altar, which is great early but not so much later. With an early Altar you can probably build a pseudo-engine with lots of Bandit Camps and Butchers, though I'd be very hesitant about getting GM over Province as the draw is poor and Butchering Provinces can end the game quickly. Without an early Altar I find it hard to imagine that a Butcher-BMish thing isn't superior, though I'd still include a Bandit Camp (Butcher-BC-2nd Butcher), so maybe that doesn't really count as BM anymore.
Some adventurous part of me wants to build a real engine that uses Adventurer for draw, but eh, I think at best that requires some really careful maneuvering just to be competitive with Butcher-BM...
