You right, none of the choices making such a big difference and its all about personal preference.
The doran's passive are since the beggining of S3 =D
Ty for your advises anyway :)

Thank you for the reply. I see what you mean about the Doran's Ring, and the new passive (I swear that wasn't always there) is pretty nice. I'll probably stick by maximizing laning potential with runes and masteries, but I don't dispute your reasoning. None of the choices seem to make any great difference, so it seems entirely preferential whether to have marginally better late or early power. Thanks for clearing that up.

Ty for commenting, As you said, still building this guide and alot of undone things that i will publish after thorough writing which i am trying to do as quick as possible according to my free time.
about the runes, i agree that the 1.8x9 ap at level 18 seems like not much, but related to our other options, i think its the most efficient, let me explain:
We solved the mana regen problems as we got the double Doran's Ring, i never felt too much mana hunger after doing well with last hitting while holding the rings, so mana or mana regen runes are useless in my opinion.
Every armor rune will also will be less efficient since we are playing in the middle, and we will probably be facing AP opponent.
The m-res runes in seals are just low scaled, if you take the flat its 0.7x9 which is pretty low (6.3)
and if you take the scaling rune its useless early game (when its truly needed at lane phase) and the exceed the flat ones only at level 8 when laning is about to end, and than 1.8x9 m-res wont be felt anyway, im not saying that 1.8x9 AP will turn up the tides, but i still think that they are the most efficient out of the other runes.
If you perfer most defensive playstyle, i would take the flat m-res glyph 1.34x9 early games can really be effective but it will cost us a loss of alot of ap (3.06x9), not recommended.

This is a strong start, but more details on gameplay are needed to justify this as an in-depth guide, as well as more champion match-ups. I understand this is something you are very much still working on, so I expect I shall see this in time, but it still stands as something that needs work.

I like your build and fully agree with your rejection of Hextech Revolver (but I'm kind of biased, I hate that thing on Ahri). However I strongly disagree with your Greater Seal of Scaling Ability Power. They offer roughly 90 damage, before resistances, in a single target QWER rotation at level 18, which is pretty insignificant. Flat mana regen, or else armor or mres to maximize Ahri's early game play should ultimately allow for a stronger late game than 16.2 AP by enabling her to snowball more easily. Perhaps you agree, perhaps you disagree, but it's something I would like you to try and convince me about if you stick by scaling AP seals.

You have the right build, masteries, and runes going on, but you don't actually talk about how to play Ahri. You talk about items, small section about positioning and tips, but you should include at the very minimum, a sort of walkthrough for playing her in mid lane against the general champion. What do YOU normally do when you play her?

Added match-up chapter.

Took your advice, changed.
thanks again for your constructive feedback :)

You're on your way to an upvote. Might want to take out Clarity because in all honesty that spell becomes worthless somewhere past the 5-minute mark.

.

I'll give u a +1 for your hard work.

Working on it already :)

a match up section would be a good addition.