Lucian

Bottom

Stay Dead

Ramping damage, lifesteal/sustain, and scaling ramp damage.

Precision

Improved attacks and sustained damage

Press the Attack

Attacking a champion 3 times will expose them, dealing bonus damage and causing them to take more damage from all sources for 6 seconds.
Overheal

Excess healing on you becomes a shield.
Legend: Alacrity

Takedowns on enemies grant permanent Attack Speed.
Coup De Grace

Deal 7% more damage to low health champions. Gain AD/AP after kills or assists.

Sorcery

9% attack speed, 10 ability power or 6 attack damage

Absolute Focus

While above 70% health, gain up to +40 Ability Power or +28 Attack Damage (based on level), Adaptive.
Gathering Storm

Gain increasing amounts of AD or AP, Adaptive over the course of the game.

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.

WhyAbsolute Focus

Absolute Focus' raw AD value grants you the ability to trade aggressively and pump out damage from behind your support as well as last-hit more effectively in lane thanks to the additional AD.

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.