I am playing her like this on Top, Mid or Bot ... Rapes everywhere!
Play her Skill Sequence/ Runes as you want to .I am just giving an advice how to rule !
you can switch the Items as u want .. but in my opinion is how I showed it the best way !
dont forget the Wards ^^ (On Bot and Top very important!!!)
....you`re also the support in mid/late.
You start with Dorans, 1st wards coming in after you was first time back!!!
Either you have 1k gold + and can buy an second dorans + shoes + 2 wards + 2 Mana potions ,or u just go back with 625 g and buy 1 doran and 2 wards (Do not count for Mid, just get wards if u feel saver this way)

AND VERY IMPORTANT !!!!!! : USE UR PASSIVE !!!!!!!!!!!!!

This is an build for the Summoners Rift , Dominion coming soon.

Top : It is important to allways have your Poweraccord ready if the enemy wants to attack you! LASTHITS are the MOST Important thing here .. u need to play deff @ your Tower!!

Mid : Just try not to hard to push so that the Jungler have had his place!

Bot : Lil bit more difficult:
1st DONT STEAL FARM!!
2nd Try to be allways in an bush, use your poweraccord to hit the enemys down, dont be afraid to attack and to move agile , u have tons of dmg ^^!