Roaming is the strongest part about Ahri since she is the most mobile mage in the game for short bursts, only Kassadin can rival Ahri in mobility as an AP mage and with this guide she is definitely the better of the two. When you hit level six you need to roam bot and get ganks of in the bot lane or go ahead and go get a pick off in their jungle.
The most important thing is that you track the enemy jungler as best you can. If you are going to 3 vs 2 or even better – 4 vs 2 their bot lane, then you need to make sure that their jungler doesn’t show up. This works really well if your support is a champion such as Sona or you have a jungler such as Zac or Skarner. With Sona in the bottom lane you can be sure she harassed them down to 50 – 60% of their health bar, all you need now is a charm, Q and ignite to get the first kill – and then Spirit Rush followed by Fox-Fire and an auto to finish off the second. This should then lead into a dragon and if you’re lucky + 6% damage from an inferno drake.