Welcome to my Ahri guide
This build aims to deal 'tons of damage' with the foxy lady

I won't be making this too long, basically just showing the basics which I want to share

On top of the basics I want to point out the most important early misconception about Ahri
Ahris Fox-Fire is her BEST skill not worst
Ahris Fox-Fire is awesome!!!
You need it! You want it! You'll love it!

With rank 5 +40% CDR her Fox-Fire has only 3 seconds cool-down while being the hardest hitting ability

Hopefully this build will help some of you out or bring you new ideas on how to play/build Ahri
Thanks for reading it in advance ~

Damage 50 (+3 / per level)
Health 380 (+80 / per level)
Mana 230 (+50 / per level)
Move Speed 305
Armor 11 (+3.5 / per level)
Spell Block 30 (+0 / per level)
Health Regen 1.1 (+0.12 / per level)
Mana Regen 1.25 (+0.12 / per level)

Not much special here, aiming to have a good ap boost throughout the game
And mana regen, as she can run into mana problems

Mana regeneration yellows
Magic penetration reds
Ability Power per level blues
Ability Power Quints

These are my rune choices
Some other runes that would do good would be

Cool-down Reduction blues
Armor yellows (if you think mana is not an issue)

Pretty standard AP masteries with a little mana regen boost
Adding the buff duration mastery is a nice + too imo
(since blue buff is awesome on Ahri)

You could consider, changing the Utility side points, into defense and magic resist in the defense tree
(Do keep flash mastery though if you take Flash)

I aim at highest damage while getting the sustain from spell vamp
The tactic with Ahri is basically hit and run, so I consider spell vamp the best form of sustain on Ahri, with the high burst damage from Fox-Fire (every 3 seconds)

I would say that if you are trying to tweak some defense into this build, then at least keep the following
Core items:
Rabadon's Deathcap (Rack up that AP ratio)
Will of the Ancients (Adds great sustain on Ahri, and helps out the team too, for a small price. This is the best Ahri item out there)

Void Staff (If they start stacking MR it should be in your core, most of the time)

While getting your preferred
Defense items: like
Banshee's Veil(your amazing MR item and that passive + your dashes will make escaping easy)
Frozen Heart (defense, amazing passive, CDR!!!)

You could consider Lich Bane instead of Rabadon's Deathcap if you need that 30MR earlier while still getting a huge damage boost

Rylai's Crystal Scepter (Rylai's gives you the extra healt and utility to get anything done. Having spell vamp, quadra flash and slow will make you one slippery fox)

Void Staff and items mentioned past it are all optional
Other good items:
Morello's Evil Tome (Almost a must have without Clarity spell, it has all of what Ahri needs, but not in a huge quantity, get this item if you can't afford those big cash items)
Deathfire Grasp (good active, AP and CDR)
Quicksilver Sash (remove them pesky debuffs)
Zhonya's Hourglass (Defense, AP, good active)
Mercury's Treads (vs CC heavy teams, you could grab a Moonflair Spellblade too if you don't want to change boots)

Spirit Rush > Fox-Fire > Orb of Deception > Charm

At level one I prefer to take Orb of Deception to have a good ranged skill shot
At level 2 I take Charm as it will provide me with CC
At level 3 I take Fox-Fire And max it asap! Highest damage, and lowest cool-down at rank 5

Fox-Fire is the skill which I utilize the most in my play-style, for its damage and spam-ability

Flash
Combined with Spirit Rush tower diving to finish someone off and get away has never been so simple
Crossing the jungle being an obstacle? Maybee if you weren't Ahri

Clarity
This is my personal choice on a lot of mana hungry AP champs
Ahri can burst with Fox-Fire every 3 seconds at r5 with 40%CDR and you don't want to be out of MP for that Spirit Rush when you need it the most

Pros:

High burst
Great CC ability (when you land it)
4 flashes with ult+flash
A whole new level of tower-diving
High skill synergy for instant burst
Range
Her looks
Her voice

Cons:

Squishy
Mana is an issue now and then (blue buff is awesome on Ahri)
Charm is often hard to land (usually best to do it point blank and treat it as a stun)

Ahri can serve multiple roles in the team

---

Initiating with a successfully landed Charm

Preparing the kills with Orb of Deception

Finishing off run away champions with her Spirit Rush + Fox-Fire
(add the other 2 spells on top of it if you must)

Baiting enemies to chase you into Spirit Rush, Charm, Orb of Deception and Fox-Fire
(anyone who chases an Ahri that has maxed her Fox-Fire better have a death wish anyway)

She could go Solo-top or Mid (haven't tested her in the jungle
(but starting with Fox-Fire could possibly make her a decent jungler)

Protecting allies. With a well placed Charm you could turn the fight around completely

Ahri's Fox-Fire, is a priority, the skill prioritizes champions, same as her ultimate Spirit Rush
Her Fox-Fire has very high base damage and has good scaling
(3 hits of Fox-Fire on same target = 2 full damage hits instantly, without aiming)

Her Fox-Fire is fully in sync with her Spirit Rush and everything is in Sync with her Charm skill

The only skill that feels somewhat lacking in her kit is her passive, which still has its uses

END ~

---

Thanks for reading this guide
This is how my Ahri build looks right now
Hope you will enjoy it as much as I do

I am looking to take this foxy lady to her 'climax' and would love to hear anything that can be improved to get her there
So if you have any points that could be improved, please let me know