Only one preparation at a time. And here's the board:
OMG BOARD! The fastest bows are flatbows, shortbows, and halfmoons. Most people think halfmoons are superior to shortbows (but they aren't). Since this, most people try to sell halfmoons at higher prices... so stick with shortbows. Also, with a higher firing rate you will get a lower accuracy (higher hang time/lower projectile speed).