I used to field my general and BSB like this when I first started playing. Ironically, though, this ends up wasting points in my opinion, because your losing the combat capabilities of both (especially the elector count).
My elector count rarely gets killed. Give him full plate or Armor of Meteoric Iron and the Holy Relic and make sure the unit he's in has a unit champion to accept challenges that you know your count will lose. This frees up the count to kill rank and file to help win the combat. Then, hopefully, the combat will be over by the next turn. Otherwise, your count may admittedly be in it deep.
Just my experiences with the idea.