JoyAdmin already replied to a request like this
http://www.hearthranger....a-really-silly-A-I.aspx
In essence, the config files are of vital importance in the decision making process of your bot. Make sure you have the most updated ones.
Also, it depends on what deck you're playing -
- Cubelock is too tough
- Any Control deck will not work
- Kingsbane Rouge will not work
Try and use an aggro deck like murloc pally, which got rank 6 last season with Ljac's deck. The misplays are limited because it's just SMorc