Ugh; Kerns are the bane of Huscarles! I still remember my Viking campaign where my king and his 2nd son were almost completely massacred by just 2 units of those guys. They whittle you down with their damn darts, and refuse to engage when you try to charge them. I felt like Wile E. Coyote chasing the Road Runner...
I see you still haven't got over that one Martok...!