- по Heroes 3

From my own experience, I've realized that when besieging a Castle, the towers deal more damage each time if the Castle withstands the siege, and so on in an increasing manner... However, if it is snatched from you, you will have to capture it back (naturally), and the towers will fire at you with the same strength as they did at the enemy (when you were defending).. The disappointing part is that when you snatch a Castle with "wonder towers," this bonus disappears and must be built up again... Maybe all of this is a bug, I don't know, maybe it's designed that way for the towers....
And to control them, you just need a hero even with level 1; the most important thing is that he has the artillery skill (the skill that allows controlling the ballista in battle)... and that's it;)[/QUOTE]

Regarding artillery - that' same clear, I just gave a hint in my previous message that it depends on the Hero, that's all;):)
As for the towers - I haven't looked at them particularly closely. I always comforted myself with the thought that it depends on the experience, attack, and other attributes of the Hero!