I've long supported ganking. But I've come to believe that one-shot ganking needs to be nerfed in anyway possible. There is absolutely no reason that players with over 20k resists and 30k health should be one-shot without a chance to fight back. You can list all sorts of counter play - get more resists, get more health, slot magelight - but at the end of the day, it's not good for pvp gameplay.