The two are not equivalent in scale, accessibility, or reliability
Premium Boosters: [PRB-01] The Best and [PRB-02] The Best 2 compile the best cards from past sets into a single release, featuring reprints, alternate arts, and must-have staples for both collectors and competitive players
Losing a whole four manas worth of tempo should be enough to lose Twin decks the game in many cases
If you want to keep the pirate typal theme, have Breeches, Brazen Plunderer or Dargo, the Shipwrecker as your decks partner
Unsurprisingly the fate of Heart is rather bound with planeswalkers as it is both an amazing tool to pressure them as well as a good thing to be powered by
You can order singles of just about any basic you like which means you wont be wasting any money on bulk you might not want