Deal 7% more damage to low health champions. Gain AD/AP after kills or assists.
Glacial Augment on Jinx is great for keeping you in range for follow-up damage, kiting, and slowing the target so that you're reliably able to land [W] and [E].
The free stopwatch from Perfect Timing can seriously come in handy especially when being tower dove for a potential out-play. Selling the watch after use is an extra bit of gold income to hit your item power spikes.
Biscuit Delivery grants you fantastic lane sustain and allows you to take a number of small poke trades while still being able to heal off any incoming damage. The extra bit of mana is nice for a few extra rocket shots.
Approach Velocity allows you to follow-up and chase with with slowing auto attacking from glacial augment. It also allows you to close the gap on running targets if you're able to land [W] or [E] on them.
Overheal is a great laning phase rune choice for absorbing and avoid massive amounts of poke damage, especially when paired with a healing support and Targon's.
WhyCoup De Grace
Coup De Grace is the go-to rune choice for reliable damage amp when attacking squishy targets, especially in the bottom lane.