Thunderbrd
C2C War Dog
By "ideal", I mean for gameplay and balance, rather than historical accuracy. The promotions no doubt help, but as a suicide unit a ram's life is a short one, and they're not going to be earning any xp to gain more than they manage to start with.
It's not me I'm concerned for. I can just guess how many rams I'll need, build a big stack of them and march them all over together to use on the same turn. The AI doesn't seem to be wrapping its head around that though. Does it understand that rams are not normal siege weapons, and that it needs way more of them than it would catapults?
It could probably use some tweaking - but then again in my test game they came at me with a lot of rams first so at least they do realize it makes a difference. It's a terrible counter to what you're saying here and I don't mean it to be a final word on the subject by any means but... it cannot certainly be the WORST way the AI makes less than optimal decisions. There's a LOT of work to do on the warfare AI strategy and I figure that even if Koshling doesn't pick up the ball there I'd rather work on that whole structure as a major project that encompasses many changes taking place between now and then, including this one. To me... those developments are another step on the assembly line of development. It won't be ignored forever. In the meantime, an easy fix to get them to build more would be to give them (and I'm reluctant to say it) a little AI weight on the unit xml. This would inspire the AI to build more of them. Obviously they at least have the attack sequence down correctly since they do attack with them first.
The promos on such self-sacrificing units would make it important to enhance your military city's xp output for such unit types. I realize many won't survive the assault but it sure makes the way you build them count. If they prove tooooo weak I can easily adjust their base numbers. A little improvement in their breakdown abilities does go a long ways. I'd have given them withdrawal ability in addition to combat limit but I had a hard time justifying them fleeing from the gates once there unless the gates were already destroyed.
Just keep in mind that the goal of the new structure is to make warfare for those eras FEEL more realistic.