It sounds like we have a quite similar idea. Another thing which I like to do is send some archers up on the walls.

I got caught in a situation last night where my only foot units were spearmen. Great on the ground, but with decreased life expectancy when Pharaoh's Bowmen show up and start shooting up at them. Fortunately, I had two other groups of spearmen nearby on the ground, and sent them to save the others up on the wall by putting them into "standard formation", running them to the archers, and turned them loose. My men on the wall had about 40% casualties, but the other two groups of spearmen made quick work of the archers when I left them alone to do it. It seems that my new towers just did not shoot as fast as Pharaoh's Bowmen.

I totally agree on the battering rams against stone walls. As I said, when I have a long (or wide) line of siege towers, the enemy cannot concentrate on just one or two. Use two and probably lose one, and maybe both, or use 6-10 and not use any. They only cost build points, so it doesn't dig into your cash. With my own archers on the walls while my heavy infantry and cavalry make for the town square, my archers and new towers make quick work of any enemy infantry or archers who try to retake a gate from me, as happened last night. Unfortunately, when I took that place, I had 9 groups of spearmen, and six of cavalry, and no archers. I learned even more just last night!

Strength and Honor

Celt Centurion