I was wondering, do all NPC's level to your current level now? Because I have had Faendel since level 1, I am now level 15, and he is still kicking ass with Imperial Light Armor....not to mention a Frost Dragon just attacked Angi's Mill ( or Anga?) anyway, it attacked the mill and those three workers kicked its ass, not a single one of them got downed. Playing on Master.
If they do, Im pretty happy, because that means I dont have to go companion hunting every 10 levels.