Editing sieges

[SigniferOne]

Ok, have you guys figured out yet if we can alter which siege options are available for the besieging party? I mean it is SO easy for a guy to build Helopolis-style siege towers that Epic Walls are nearly useless. If we could, like, triple or quadruple the amount of build points required for them, that would be nice. Or better yet, make building of them contingent on some outside factors, like having Archimedes as your ancilliary or something like that.

I dream of a time when cities will take 20 years to build Epic Walls, and once those are done no one will ever be able to take them head on, and will have to destroy all outside armies, and then lay siege to it for 12 years to starve it out. Where Nebuchadnezzar failed, someone else might succeed

I'm interested in any and all ways to limit siege options for the besieging party. Maybe that involves editing the siege tower models or something like that, so I ask everyone who deals with these things and know how they work.