I mean what are you actually looking for in the game. It's a little early to talk about your skills and real combat since you don't have your full toolkit yet and from what i can see you have the hall of the novice gear and no job crystal at lvl 40. That means you are missing the job quests and skills that will help round out your experience. I can say that rouge/ninja has no useless skills, however they are given to you slowly so it takes a while for a job from lvl 1 to fill out and get smoother.