Poll regarding the Rules: Mullich, Mages, Fortress on the Hill.

Unban all the mentioned heroes. Mulih because it adds variety. The same artifact that gives +2 to speed is quite common, and that's fine. Specialist heroes for magic because Solmyr can theoretically strengthen a tower, although I still don't start with him. The Tower is a charming castle, but it's weak, and any improvement will benefit it. Fortress should be banned. Upgrading creatures is an important strategic move that requires transferring troops to a city where the improved dwelling has been built. The Fortress can make this task too easy. For example, you have a swamp castle deep in your territory, and you upgrade ducks almost as soon as you reach your opponent's fortress, without losing time. This is an undeserved advantage. On the other hand, this may not happen more often than any other lucky break. But I still voted against it.