Why is AP Kennen no longer viable in pro play?
Back in Worlds 2016, every top laner who played Kennen built AP with items such as
, but this season every single Kennen I see(both in SoloQ and Pro play) builds AD. Why is AP Kennen no longer viable? Is it because of Protobelt nerfs or nerfs/changes to his ultimate damage? Or buffs to Crit and Botrk? Now that they reduced AD ratio on W and increased AP ratio on E, will AP Kennen be viable again?