Q:
WvW Mesmer build
I found I needed to significantly increase toughness and vitality from what I was using in pve.
There is power-vitality-toughness (“soldiers”) armor and accessories available for the dungeon tokens you get from running AC and HOTW and for karma from the vendor at Cathedral of Silence after the Grenth event in Orr (though he only sells three pieces of the armor). You can also buy this type of armor from the WvW vendors for the badges of honor you get as WvW rewards.
Your effective health (either by increasing toughness or vitality) should be well above 20k.
http://gw2buildcraft.com always is a good help.
Iruwen Evillan, Human Mesmer on Drakkar Lake