I literally leave the AOE a second before it hits and I'm always like half the size of the AOE from it.
Running to the sides from frontal cone AOE doesn't help. Running THROUGH the enemy does, but you have to keep on running so far that you can't melee attack him from the back.
This is seriously ridiculous, I literally have to use sprint sometimes to avoid AOE that is 360 degrees.
In every other MMO I played, saying sorry lag, was just a way to make an excuse for your screw up. Here it is just THAT freaking bad, I avoided only ONE AOE in an evening by using normal running speed and position, how it's actually supposed to be.