One slot in a booster pack is set at Rare or higher, so in theory you should get one Rare per booster, but Super Rare and higher cards are much scarcer
2-4: The average Limited card
I really want to put this battle in F-tier, but I can't shake the feeling that it must be better than it looks, so I'm going to play it safe and stick it in the C-tier
This leaves us with a weird equation: if you're looking for the best reprints, Bant is the way to go, but none of the decks are especially exciting on the reprint front
You could build it up as a Voltron commander and make use of this to commander damage your way to victory, or fill it up with other ways to dish out damage like Roiling Vortex and Guttersnipe
These cards are useful in almost every matchup, so even though they aren't on-theme for this deck, they're too good not to include