So I also didn't notice the 3-player tag at the beginning, which definitely changes things a lot. If both other players go Mountebank, you won't be able to keep up on trashing without 4-5 Foragers--noting that this still might be maintainable, especially once you can get Wharves via Uni.
Some sample games against bots. A few notes though. First, these are bots. They start the game dumb, and they don't adapt as the game progresses.
Second, the bots are going Soothsayer instead of Mountebank. What's interesting is that this seems to be good against Mountebank/BM, but not against a trashing engine. It gets Gold into your deck, but against trashing, the extra draw for your opponent makes trashing those Curses easier. Against Mountebank, though, the Gold gains may overpower the Copper gains.
Third, the bots aren't contesting Wharves in many cases. So it's really,
really hard to compare these to actual play. I guess if someone wanted to take the time in Dominiate, these could be simulated, but man that would be hard.
5/2 Mountebank, transitioning into Forager/Uni/Wharf engine. As with any engine with trashing, this starts off slow. I could have let it go on a few more turns to run up the score at the end, but you can see it kicking into high gear.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394552313993.txt3/4 Double Forager, transitioning to engine. By far the easiest of these games, though again this is vs. bots going Soothsayer rather than Mountebank. Nonetheless, I have the worst shuffle luck I've seen in a while, trashing a Copper, then drawing $2 on T4 and T5, and yet still come back very easily.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394552783974.txt5/2 Mountebank again, with Tournament support. Note that though the Curse split is about even, the bots have a lot more Gold (from SS). The copper from my Mountebanks isn't enough to slow them down, and I come in third.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394553385363.txt5/2 AGAIN, going pure BM+X. Major fail. Again, I think BM-SS is going to kill BM-MB but, alas, Dominiate doesn't include Soothsayer.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394557101728.txt3/4 Forager/Potion. This goes about as well as the Double Forager game above. Note that in both cases, Trusty Steed and Princess were pretty important. I may have to try each without any Tournaments, though it'll require Silver or Gold as a payload.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394558883639.txt3/4 Double Forager without Tournaments. Much closer. I trashed my Potion too early here, though.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394559261643.txt5/2 again, so I tried SS-BM for the hell of it... and won. I think another SS would have been good here.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394559460829.txt3/4 Forager/Potion again. I think I get my Mountebank too late here, and possibly don't get my third Forager fast enough, and the engine takes extra time to get moving.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394559895111.txt3/4 Forager Potion but with no Tournaments. Better than the previous one but still not enough to win.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394560413565.txtFor good measure, one last Forager/Forager game, with Tournaments and Mountebanks as payload.
http://www.gokosalvager.com/static/logprettifier.html?/20140311/log.50635cc651c3843e7939ece8.1394562670335.txtNote:
These aren't cherry-picked. Before anyone makes the claim. They are, however, in no sense optimized. This is just me doing a few games in my spare time for the heck of it.
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OK, so what can we learn from this?
One: Trashing with Forager seems to be better than no trashing.
Two: The bots are dumb.
Three: Soothsayer might well be better here for BM than Mountebank. So if the bots are, on average, going after BM, maybe they're not actually as dumb as we think.
Four: If no one is contesting Forager, feel free to trash your non-Copper treasures once each for a gigantic boost. In the end-game, don't be shy of trashing actions if Forager gets you $3.
Five: Payload is key. Mountebank as payload just doesn't do it because it's terminal. Tournament as non-terminal payload was incredibly helpful.
Six: Tournament is a swingy card, and always will be. Trusty Steed and Princess in the last few turns can be the difference between winning handily and failing.