@pinks I mention the level two gank in the laning phase part with a couple junglers I think have strong level two ganks. I still think you should start Q level one just because its all around better skill. Also I would recommend for the most part not autoing ranged champions early game because of creep aggro.

@emoriam I made some of the changes that you suggested. I think I was considering doing a more in depth item part, but for now I'll just keep it like this.

@Thoukka i think emoriam explained it well, I would add that you aren't really auoting much in team fights so you don't really need it. Laning phase the amount of damage it would give your autos also wouldn't be worth investing any points into it.

Also I'd like to add I appreciate the feedback guys!

I find that starting Charm is best on Ahri because it will usually provide more CC and more damage at level 1.
It's great for invades and counter invades and it also allows you to hit 1-4 free auto attacks if you hit the enemy champion with Charm.
Also, Orb of Deception tends to push the wave if you decide to use it early on, so it can lead to you getting ganked by a strong level 2 jungler.

@Thoukka

Expose Weakness does apply your own damage as well and Double-Edged Sword is a choice mostly for melee characters.

On topic, I think you should clarify when to build Athene's and when to build Morello because for now it seems like there is no explanation. Besides, you can possibly skip a Mana Regeneration item due to Ahri's low mana costs and rush DFG but that's one you. I'd just recommend BV as a defensive item and your example build doesn't show and upgraded Trinket.
Check out some coding guides to add some more appealing things to your guide, the reader will appreciate it. Basic codes are [[Ahri]] and [icon=Ahri size=50].

Why do you take Expose Weakness in the masteries and not Double-Edged Sword or Arcane Blade . Normally you just take Expose Weakness , when you are a tank, because you don't do damage and lovelier buff your mates, that they deal more damage.