Gain increasing amounts of AD or AP, Adaptive over the course of the game.
Dark Harvest offers you massive mid-game burst damage. It also offers you fantastic lane poke if you're able to land a [Q] bounce after picking up a stack from a Cannon minion.
Miss Fortune can easily proc Cheap Shot with the fantastic AoE slow from [E].
Eyeball Collection grants a fantastic amount of damage if you're able to pick up a few kills/assist in the early game.
Miss Fortune output massive amounts of Ability damage allowing you to sustain in teamfights with Ravenous Hunter.
Miss Fortune often acts as a back line caster AD Carry, relying on a lot of your damage coming from [Q], [E], and [R]. When you're staying far back like that you should have no problem staying above the Absolute Focus threshold.
Gathering Storm makes you a late-game monster,allows you to completely take over the late game with a well-timed [R].