Short build I made a long time ago when I was heavily into Ahri. It's pretty short and sweet but all in all, I've updated it to season 3 to make it pretty useful. I made her pretty tanky in this build and that is due to the large amount of ad assassins being played in the mid lane as of the Pre-season. Now as an AP Mid, you have to sustain a great deal more than you previously had to.

Pros
*A good way into build, has true damage better than ignite every 4seconds
*maneuverable
*has a charm
*good finisher
*passive spell vamp
*tank (ish)
*good mobility
*

Cons
*squishy (early levels)

She has one main skill combo:

E+Q+W

Others may be along the lines of:

R+E+Q+R+W+R

The first one is the one you use the MOST. I usually use my ultimate while going through a team fight because most people cant target you and you pick up lots of kills. I also use it for escapes and I guess you could even steal baron or dragon with it. (never done that)

Send me screen shots of this build in action! Even videos! (private message)

Here's one of me: