Q: Orb of Deception

W: Fox-Fire

E: Charm

R: Spirit Rush

Starting off with her Passive Essence Theft:

INNATE: Whenever Ahri hits an enemy with one of her abilities, she gains a stack of Essence Theft, and can gain up to 3 stacks per ability cast.

Essence Theft 2
Upon reaching 9 stacks, her next ability power heals her for 3 / 5 / 9 / 18 (based on level) (+ 9% AP) for each enemy hit.



Ahri's Q

Orb of Deception

Is gonna be your bread and butter, and realistically your main source of damage:

PASSIVE: Ahri sends her orb in the target direction, dealing magic damage to all enemies it passes through. At maximum range, it homes back to Ahri, dealing the same in true damage to enemies hit on its way back.

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Orb of Deception
ACTIVE: Ahri sends an orb of arcane energy in the target direction, dealing magic damage to all enemies it passes through, then pulls it back, dealing Hybrid penetration true damage instead.


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TARGET RANGE:880
WIDTH: 200
SPEED: 1550 / 60 - 2600
CAST TIME: 0.25
COST: 65 / 70 / 75 / 80 / 85
MANACOOLDOWN: 7

Damage: 40 / 65 / 90 / 115 / 140 (+ 35% AP)

Ahri's W is

Fox-Fire

Which is her most basic ability but helps proc her Passive Essence Theft and give her that extra burst of Damage:

New ACTIVE: Ahri gains 40% bonus movement speed that decays over 1.5 seconds and summons three spectral flames which orbit her for up to 5 seconds.

After 0.25 seconds, each flame targets a Sight icon visible enemy, or after 0.4 seconds targets the closest visible enemy in range, dealing magic damage. The damage is doubled against Minion icon minions below 20% maximum health.

New Flames prioritize enemy champions hit by Charm Charm, then enemy Champion icon champions, then low-health minions that can be killed with Fox-Fire, and then the target of Ahri's last basic attack within 3 seconds.

Ahri summons three spectral flames which orbit her for up to 5 seconds.

Flames prioritize champions hit by Charm or any enemy hit by Ahri's last basic attack, within 3 seconds 725 range.

After 0.25 seconds, each flame targets a prioritized enemy, or after 0.4 seconds pursues the closest visible enemy in range, prioritizing champions, then the target of Ahri's last basic attack, dealing magic damage.


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TARGET RANGE: 700
COST: 40
MANA COOLDOWN: 9 / 8 / 7 / 6 / 5

Magic Damage: 40 / 65 / 90 / 115 / 140 (+ 30% AP)

Ahri's E is

Charm

, Besides her Q Orb of Deception, this is her most important skill shot can turn mostly any fight in your team's favor:

Ahri blows a kiss in the target direction that deals magic damage to the first enemy hit, interrupting in-progress dashes, charming and slowing them by 65%.

An enemy hit by Charm is rendered vulnerable for 3 seconds, taking 20% bonus damage from Ahri's abilities.

Play Video
TARGET RANGE: 975
SPEED: 1600
COST: 70
MANA COOLDOWN: 12

And Last but not Least, Ahri's R or Ultimate,

Spirit Rush

,
"Are you an Ahri Maain?
Cause you make my Spirit Rush"-Poppi Sama

Ahri dashes in the target direction, and then fires energy bolts up to 3 visible targets to deal magic damage.

Play Video
MAGIC DAMAGE:
60 / 90 / 120 (+ 35% AP)
Spirit Rush can be recast twice more at a 1 second static cooldown within 10 seconds of activation at no additional cost.
TARGET RANGE: 450
EFFECT RADIUS: 600
COOL DOWN: 130 / 105 / 80

Now this is gonna be your engage and disengage, your ultimate can set up multiple combos and ganks. Whenever your Spirit Rush is up, look for ganks, river rotations, or even aggressive fights in lane. You can dash over walls and structures which makes this a great ability to dash in, full combo and dash out. Use this ultimate to its full potential, it's a great ultimate and people underestimate your mobility, especially skill shot oriented mages like Lux, Veigar, Orianna, Azir, Zoe, etc.

and in that tree grab,
, for the extra mana and mana regen,

as well as,
, for the lvl 10 Cooldown Bonus, as well as the Bonus AP per Cooldown percent that exceeds 40% CDR.