With my build I can take on thieves in 1v1, some elementalists, but I can’t do other 1v1s. I mainly just hangout with my allies and help them kill people. And with my rune of infiltration they have no clue what happened to me and I get away, regenerate my hit points, and go back into the fight.
http://gw2skills.net/editor/?vJAQJASUjMdQZH22BedApIGUCKM0HhPQnij/JusIA+dA-TJBHABG8EAA4SAkcZgT2fAA