LasrHuntr here. I'm just a noob guide maker, however Ahri is one of my favorite champions, and if she is played right, she can hyper-carry and maybe get a Penta.

Flash is pretty much a standard spell on almost everyone. Ignite helps secure kills, and may also help secure a Lv3 kill if your opponent is squishy enough.

The reason why I start Boots and Pots is because you can dodge abilities faster and go in quicker to land your E. You can start Doran's Ring and 2 Pots if you wish to deal more damage.

i feel that WOTA helps a lot since it gives you sustain and goes pretty well with your passive. You can recover from low to almost full health (with a complete full AP build + WOTA + your passive) by using Q on a minion wave.

Get Alacrity or Homeguard enchantment depending on if your winning or losing the game.

This is the standard skill sequence for Ahri. However, you can max E before you max W, though W is the better choice since upgrading it lowers the CD unlike E.

I would say this is the standard masteries for Ahri. Feast helps a lot since you get 3 Health and 1 Mana per unit kill. If you do build Doran's Ring, this means that you will get 5 mana restored per unit killed.

This is the standard AP runes for almost every AP champion. You can always replace the Magic Pen for AP.

Your E is a great tool for setting up a gank. If they pushed too far, you can use your E to pull them even further away from their turret. This will guarantee a kill if your Jungler has boots. The red buff also helps with ganks since it slows.