Guild Wars 2

i tried using the berzerkers armor and weapons with valkyrie jewelry but my surbabilty sucks and my crit strike % is not that good either. i was wondering is the ravaging set viable for a thief? , cuz i really want to try it out , if so would it be better to combine it with knight parts for extra toughness or valk parts for extra vit?
i use d/d and shortbow and i think that rampager would come in handy for the crit% + cond dmg… but i dont wanna loose my survabilty… any help here?

Have you seen the TA armour set which gives precision/toughness/cond?
That would seem to fill your requirements.

You are very low hp as a thief and will die very easy. You need to move around a lot. Use your fingers like it was a FPS game. Even then you will still die very easy if you dont move and dodge perfectly.