Guild Wars 2

Need some help with gearing my thief optimally. What combination of zerk, valk, marauder would get me a good mix of survivability and damage? I was thinking marauder armor/weapon and zerk trinkets but I don’t know if that is optimal for crit chance.

I posted this scouting build a day or so ago:

http://en.gw2skills.net/editor/?vZAQNAoaVn0MBlOhFmCGOBkmiFqiau67+y3LEShSornCggE-TlSDABgovAAzfDcIBiR9neUqkwJAUCewDAA59Hk4IBokyKCBIYLA-w

I would tweak it for pure Roaming but it is a nice blueprint on a very durable build with solid HP that hits pretty hard.