Well if you can get a good wish success rate, then wishing well a very nice card. An almost lab for $3 is hard to beat. There are two ways to do this: the first, like in this game, is to have a lot of one card, and wishing well is a good target. I wouldn't recommend spending 8 buys on them, but if there is a good way to gain them (ironworks) then go for it. The other way is deck inspection. Good examples are cartographer and apothecary. Sadly, scout is still pretty weak even in this regard.