this build set up grants you health, armor and ability power. this will also insure that you can pick off the squishy targets in team fights easily.

armor pen runes with ability power per level runes helps to scale with a lot of ability power, and be able to harass tanks stacking armor/magic resist a bit easier.

flash is a good summoner spell that can help either get you out of a team fight alive or to close in on a target with out having to chase. ignite is a good spell also because sometimes you don't have the range to get the killing blow. ignite makes it so that your target takes true damage if a champ is low you can ignite and walk away with a kill almost every time.