I actually don’t know anybody playing full zerk. It is something you can do in pve since you can predict attacks from bosses and therefore dodge / avoid most of it.
In WvW as soon as you want to do 1vX fights or have thieves, you might want to put some toughness into the equation. I play myself with about 75% crit dmg and 55% crit chance. Always run with about 20k HP and 1250 toughness ( dont have armor value atm ) which does quite a good deal.
Also, you play scepter / torch, so you might be a shatter mesmer, even though I am not sure scepter is the best choice to generate a clone ( you get one every 3 #1, which means you have to use #1 at least 3 times, which I usually rarely do in WvW since there’s so much more you can do ( #2 #3 #4 #5, or switch weapon ).
I play GS / sword – pistol with phantasm traits, but could work for shatter as well, mostly for its control options. #3 of sword is great help to :
- lock the target
- port to the target
- get armor of chaos ( considering you have an ether field in your utilities )
And then you have the great phantasm from pistol which does tones of confusion via combo as well as the #5, which locks up to 3 targets as well. Confusion being just here to add extra damage and/or stress the target, forcing it to slow down or cleanse while you do heavy direct damage.
It all comes together, but having minimal toughness / vitality, coupled with good defensive skills is really hard to beat. I mostly tend to use defensive skills in an offensive way to basically control the target and give it some fast burst before it can actually do anything.