Maybe not too unorthodox, but it's a meat grinder.
It's a pretty move, works even more beautifully when not fighting too much cavalry.
1. Position your gigantic line of sharpshooters on a plain
2. Position your gigantic line of sergeants JUST behind them
3. Position your knights to the side
Let's say you're facing a 300 man army, with battlesize tweaker, of course
-Let the army slowly march toward you, hold fire.
-When they're close enough that every single crossbow bolt will hit, let your shooters fire
Frontline massacre
-As the army gets closer, advance your sergs 10 paces, they'll be fighting wounded and dying forces, more meat grinding
-As your cowardly evemies start routing, let your knights charge and slaughter the weak bastards.
Battle won!
Casualties 0-15
250 killed
40 wounded
10 routed