Ahri top is a strong counter to Aatrox, Mordekaiser & Gragas while Ahri is countered most by Irelia, Teemo & Camille. The best Ahri players have a 56.97% win rate with an average rank of Master on the Ahri Leaderboard. Below is a detailed breakdown of the Ahri build, runes & counters....
However, it is a crucial rune for the Glacial Augment build. Zombie Ward and Ghost Poro provide more utility along with some damage, but their damage output is not as consistent as Eyeball Collection. However, with enemy invades becoming a lot more common, you may need to take Ghost Poro ...
Import recent item sets from popular aggregators like Champion.gg in to League of Legends to use within game! No hassle. - Championify/tests/sources/fixtures/opgg/responses/ahri_statistics.html at master · dustinblackman/Championify
The most detailed and best Ahri Build, Runes & Counters Guide for middle Ahri on LoL Patch 15.6 are found on LoLalytics.