I played a 3-player game IRL, and a situation came up which seemed interesting. The kingdom, with Colony, was:
- Peddler
- Treasury
- Feodum
- Moneylender
- Explorer
- Cutpurse
- Conspirator
- Warehouse
- Lighthouse
- Embargo
With no draw, village, or +buy, we all decided to try and build a Treasury/Peddler chain to activate Conspirators, with a Moneylender to trash coppers (it later turned out that Conspirators weren't that important; nobody had more than one, electing instead to use one Platinum for money).
One player opened Moneylender/Warehouse, and was faced with a decision at turn 3 when he drew EECCC. He elected to buy a Silver, which helped in the short term, but with no way to trash it and with minimal sifting, it really clogged up his deck in the race for Colony.
So I wonder, what is the right choice here? A Silver helps now, but probably hurts later; a Warehouse helps later, when your deck is full of green, but it's hard to buy cards early or trash coppers if two Warehouse plays have gotten you down to three cards. Is it perhaps even right to buy nothing at all?