Gain increasing amounts of AD or AP, Adaptive over the course of the game.
Offense
+9% Attack Speed
Flex
+5 AD or 9 AP
Defense
+6 Armor
WhyPress the Attack
Press the Attack's exposure damage synergizes incredibly well with BotRK + Black Cleaver + [R] shredding even the tankiest champions.
WhyOverheal
Overheal is a great rune for topping off your heal to sustain chip damage from the enemy, and synergizes well with the Life Steal from BotRK and Bloodline.
WhyLegend: Alacrity
More Attack Speed simply means more damage per second output, especially in elongated teamfights where you are able to get several off.
WhyCoup De Grace
Coup De Grace is a great rune for finishing of the last bit of health on champions you have shredded with Black Cleaver and Press the Attack.
WhyManaflow Band
Manaflow Band allows you to constantly harass and poke in lane with your abilities while allowing you to sustain.
WhyGathering Storm
Gathering Storm is your late game insurance policy. Paired with Press the Attack, your late game single target dueling damage will be massive.