Here a suggestion and some ideas on the One Ring Script...
Better Isengard defenses (suggestion)
Isengard (the Iron Fortress) could do with some extra defense on the custom battle map imho. It hasn't got any active defensive mechanisms and the it's more difficult to defend / easier to capture than a standard town or castle, the garrison script aside.
1) more stable gate (or a second gate at the end of the archway)
2) defensive projectiles (perhaps even artillery)
3) some shacks and other buildings inside of Isengard that create easier to defend corridors to the town center
4) remove ballista towers from Isengard's building list as they don't add extra defenses afaics
breakdown with pics
The One Ring script (only ideas)
I posted some ideas on additional 'One Ring script' features in Baron Samedi's thread, before I realised it's now officially part of vanilla TATW. Here is the link. They're crude and perhaps a little out of the box... so don't consider them to be a real proposal or suggestion. Only playing around a little.