Do you use Steward to draw 2 Cards to expedite the reshuffle?
This gets my vote.
There are no $4s except Scout, and even if you do pull in two wasted Coppers this way, the chance that it prevents you getting an early Witch is tiny - it only happens if the rest of your deck had both Estates at the bottom, i.e. 1 in 21. And it can't prevent you from getting at least $3 on turn 4. Buying FV (I guess?) is really the expected result on turn 4 regardless, so you might as well cycle and try again for a better line-up with the Steward.
[ETA: as carstimon correctly points out, the draw
enables a $5 turn 4 just as often.]
For that matter, why don't you grab Witch yourself at any later point? I would definitely take it over the first Market, because what are you going to do with the +Buy? You already have a gainer for your engine pieces and it'll be a while before you're looking at anywhere near $16 hands. Actually, maybe not, now that I look at the total game length. Nice job grabbing multiple Stewards for the economy + trashing + to end the game.