that should be fine for custom battles too, I also balance the units out so while they are historically accurate, there will be no units that was severely underpowered or overpowered. Levies aren't too weak or trashy, regular line infantry are more cost efficient, and elites, while not being cost effective themself, are mostly very strong so they are always worth fielding in multiplayer battles. Of course, there maybe some exception accourding to cultural strength and weakness for ech faction, but believe me, the mathematical model had been basically done, and now I'm only work for fine tweaking the statistics.