Q:
Some question from newbie
Beserker is the best choice for Thief (Power, Precision, Critical Damage).
http://metabattle.com/wiki/Build:Thief_-_D/D_S/P_Shortbow
If you feel you die to much you have three option. Stick with Beserker and switch some trait out to help you survive. Keep the build and train to get better at dodging. Or swap a couple of pieces to Valkyrie while you get more experienced with your profession.
Keep in mind that the build is for Dungeon mainly, you can about anything you want in open world.
Condition Damage isn’t in the best shape for thief right now. Burning is just way too powerful compare to bleeding and thief is almost all bleeding. There is runes of exuberance that give confusion to the thief, but that will only work for WvW. There still people that make condition build work on thief, but it’s not really popular these days.