AI unit build queue

One of the major AI changes I am hoping for is their selection of which units to build. I was attempting to mod the game so that at times there was a slow cheap offensive unit, and an expensive faster stronger unit. Altho I could build a balance my needs with a combination of both, the AI always seems to build the cheapest off/def available as it needs. I wished the AI cities would build based on their overall needs and not the unit it can pump out the quickest.