Gain increasing amounts of AD or AP, Adaptive over the course of the game.
Fleet Footwork on Caitlyn empowers your ability to take trades early and often in the laning phase thanks to your improved sustain. The extra burst of Movement Speed can also help you position to get in range for the headshot proc on the enemy.
Overheal's poke resistant shield its great for establishing lane dominance with your long auto attack range to mitigate incoming minion damage.
Bloodline further empowers your ability to take lane trades and out sustain your enemy laner thanks to Fleet Footwork and Bloodline's extra bit of healing.
WhyCoup De Grace
Headshots paired with the execute damage of Coup De Grace offers you a lot of burst to finish off your target and move on.
Celerity's bonus Movement Speed helps you to position in teamfights for optimal damage output and skill-shot dodging. Celerity also synergizes well with Zeal items providing you a little extra bit of Attack Damage.
Gathering Storm is your late game insurance policy for damage. If you fall behind, try stalling out the game by denying their tower siege with your Traps. The longer the game goes the better shot you have of coming back with Gathering Storm.