Do all steps:
Disable all wow addons.
Download and install WRobot in new folder, install only your profile (don't install plugins/fightclasses).
Run Wow in window mode (not full screen, and never minimize wow window!).
Put lower wow graphics quality, but try to get good FPS (40 or more)
Run WRobot and check CPU usage and if Wow don't freeze during few minutes. (tell me here with your log file if you get freeze/cpu usage problem)
Now start to add you fightclass and check again CPU/freeze during few minutes.
Now add one per one Wrobot plugins, wow addons.