150-300dps against level 0-1 mobs? I see you're testing just outside Ascalon. I'm sorry to say but that dps won't be sustainable, only way to know if your build is good is going against Charrs in Northland.
If you can take out a group of 4 charrs alone in Northland, it's good.
If that group is with a shaman, it's better.
And if that group is with two shamans, it's great.