WvW gear advice
If you are happy with your build I would start by swapping out some of the Zerker gear for soldiers or knights, until you are happy with your survivability
I would do it in this order (assuming you don’t want to change your weapons)
1. Legs & Head
2. Chest
3. Sword / Focus
These will give you the most survivability in exchange for each point of crit damage you give up. See this link: http://www.guildwars2guru.com/topic/80673-min-maxing-with-critical-damage/
Anything I post is just the opinion of a very vocal minority of 1.