Her recommended build right now is almost pure AP with no attack speed. 1v1 this looses traight up to a blue build ez without any poke beforehand.
Her build should be botrk, guinsoos, bersker greaves and stuff like that.
Her ap scaling is absolutely horrible and ONLY usefull for long range poke. Her susteined damage AND burst comes from ap and attack speed :P And its absolutely insane. I just 1v1'd a vayne with that build