Haven – "Everything is mixed up, truth and falsehood" [Campaign 3 – Mission 2]

Guys, help me out... I've already read all your advice, but nothing helps... I've been trying this mission for half a year, if not more... I've even tried it on easy mode, but nothing works... Can you explain in more detail how to do it? Please... Thanks in advance)):smile45: I've captured all 3 or 4 castles on the surface, and only Igor's castle remains... He has a pretty strong army... I can't defeat him... My army grows 5 times slower than his in a week... What should I do? How can I win?