I saw this list once, and thought it was an interesting idea: Calandra, with just 3 Impalers and 4 Bombers, 50 points.
I could never go back and find the link, but the person was using Soothing Song to manage all that fury. Personally, I think it'd be better not to have the last Bomber, and instead add Dygmies + Fell Caller + Gobbers, or the like.
This brings me to my question: have you ever used 3 Impalers? Perhaps in this situation, or more likely with Captain Gunnbjorn to take advantage of Explosivo? A few thumpers, three impalers, all at AOE 3, seems pretty scary... assuming a Bomber is coming along for the ride, too.
I know he's not all that "good", I'm just wondering if anyone has used 3 (or more) Impalers, and these seem like the most likely scenarios to do so :-)