I've done a fair amount of research an the topic, and most of them say the same thing. Gurth does more DPS, however it's based on proc. Whereas ESS does more consistant damage without having to cross your fingers.
I'm sure someone here can relate to this... However... my RNG sucks (why I'm playing a Ret Paladin, I may never know). It sounds kind of dumb, but it does.
I've recently moved guilds, so unfortunately I don't have any logs since since the weapon was obtained.
All I know is this thing never procs... I mean like 2-3 times total on Ultraxion...
Someone help me out with some input, some reason, something to make me believe that this thing is any good.