This is an excellent discourse on the importance of unit range in battle; The only way to make it better is to link it to another equal discourse about unit speed.
While I admit to having developed a quite successful (thus far) combined arms battle force, I'm entirely too lazy to explain my reasoning and purpose for how I came up with the ratio for the mix. Perhaps someone else already has (and I missed it) or someone else is willing to expend the time to do so and link it here?

