[pdoktar]

I think with such large forces, you could consider increasing the map size to give you and the enemy more room for manouver. If you give a large map for the AI when its assaulting, it can give you some nasty surprises, as you can´t cover the whole area with adeqaute forces, and then you´ll find yourself truly in the need of a reserve. If you have too small maps, especially the AIs advance and assault becomes very easy to stop.

And as I now see, this map is getting somewhat small for your own advances too, because you´ll just end up doing a basic frontal assault. It´s your choice anyhow.