I have said it before, but I'm going to agree with dondon here. If you are only using workshop in gardens/silk road rushes, you're missing out on most of its value. Whenever there are engine components you want costing <=$4, that's where these kinds of cards shine. Now, workshop is also passable in rushes, but lemme tell you, workshop rushes are not all that great to start off with. So armory's effect, on-the-whole, is better than workshop, though yeah, sometimes workshops is better anyway. And heck, in feodum games, I there's not going to be loads of difference anyway - armory gets you silver, which is nice to topdeck, and then you just buy the feoda. But I don't know why you want to feodum rush anyway.