These cards are all useful at drawing extra cards, which is one of the most powerful tools in any card game.
Salvage is perfect for decks that revolve around the Toss and Deep mechanics, but don't discredit it for other Bilgewater builds. The ability to draw two and thin your deck means this is seeing play elsewhere, too.
Twisted Fate is probably the most versatile Champion currently in the game. His ability to draw, stun, or deal wide damage when played is extremely useful, and he can take over games when he's leveled — which also requires draws. Synergy!
Pick a Card, on top of being Twisted Fate's Champion Spell, is being played in multiple early versions of decks for its incredible draw potential. It might take a turn for the payoff to appear, but drawing four-card on your following turn is not to be taken lightly.
These three also synergize nicely with our next group of cards worth crafting: the Pilfer Package.