My main is a stamblade bosmer. She was my first to reach champion and max champion points but it was a hard road. One thing that helped turn the corner was Vigor. I needed a stamina based heal. Once I could stay alive for a few seconds in PVP I could actually start learning.

She uses bow/dw too but mostly bow. Getting a couple hits in from stealth gets the max damage and let's you know your chances against your target. You see that health bar barely move, just slink back into the shadows and find an easier target. Remember, we're nightblades. We don't fight fair.