Question About SIvir

[laidowntorest]

I have a question about Sivir. I played a match and the team had a little bit of armor not enough to get % armor pen but enough to get striaght armor pen. They didn't have any ability power so i didn't want to get a Maw, So i got a Duskblade, But i didn't see that on any item builds on sivir anywhere. What are the items that you should just not get on her. (and if you want leave general tips here