With the availability of Adventures online, I stumbled upon what appears at first to be a fast two-component Big Money strategy.
(Good luck) (Bad luck) Overall the strategy is quick, reliable, and resistant to attacks. Here's how it works:
Open with Jack and Bonfire, trashing two of your Coppers. If you get 5/2, take Jack and be sad. If you get 5/2 and Baker or Borrow enables you to get $3 for Bonfire on the first shuffle, do it.
Then next thing you want to do is to thin your deck by trashing Coppers with Bonfire and Estates/Shelters with Jack. Buy Bonfire whenever you have 2 Coppers in play until you are thin. Unless you get all 3 Estates in 1 hand, you should be able to buy Bonfire on both turns 3 and 4. On turn 5, you should be trashing your last or second-to-last Estate and have several Silvers and at least $5 to buy with. Best-case scenario, which is fairly common, you end turn 5 with your deck consisting of 1 Jack, 1 Copper, 3 Silver, and 1 Gold. From there buy Province/Gold/Silver with Duchies as needed. With no attacks, you should get your 4th Province around turn 11 or so.
So what makes this better than DoubleJack? Notice how around turn 5 or 6 your deck has mostly Silvers and is nearly free of junk? Start buying engine parts instead of Gold.
Turns out you weren't playing Big Money at all! You were trashing and building economy to prepare for your engine!
Ok, so back to Big Money. I made a bot (attached) using Geronimoo's sim. It buys Bonfire when it can up until turn 6 whenever it has 2 or more Copper in play. I added logic to buy another Jack when facing Cursing attacks. Otherwise, it's a standard Big Money strategy. Some simulation results of note:
Beats Cultist 57-42
Beats Rebuild 80-19
Beats FG/Council Room 54-42
Beats Fishing Village/Wharf 70-28
Loses to Young Witch/Tunnel 28-70
For these two, I am not sure how much cleverness has been programmed into the bot, so take them with a heaping load of salt.
Beats Hermit/MS 51-45
Beats Counting House/Travelling Fair 62-35
Has anyone else used this strategy? How did you do with it?