There are enough battle boards for SAGA that you can just pick a couple and use them as 'counts-as' list easily enough. The variation between armies in SAGA comes not from the troops themselves, but from their abilities. Each faction has access to a warlord, elite troops, regular troops, and levy/peasant troops which are all more or less the same. Its their combined special abilities that sets them apart.
There have been some SAGA battle boards made for Lord of the Rings you could try... they were posted on here a while ago. The main challenge with SAGA is that, to my knowledge, there has been no way to integrate a wizard into your battles.