I think Badgers need to be absurdly powerful.They shouldn't be PCs, though, ever. And, of course, they should be on a level with Wildcats. Martin (a 20th-level character if there ever was one) only just managed to kill a wildcat, and nearly died in the attempt. Badgers have only ever died by assassination, a fight with a wildcat, or being swarmed by hundreds of vermin.

And you neeed a Marlfox PrC. Rogues with axes...