Walkthrough tips, Discussion of Campaigns [Heroes 5]

Another interesting point: Nicholas has some strong allies - Vlad and Deidre. I'm fighting against Nicholas, but these two are almost as strong, and they have even more troops... It's a bit frustrating.

I own all the castles except for one. But Nicholas is guarding it. And after all the battles, I don't have any troops left. In total, I eliminated about 50,000 skeleton archers and 250 dragons. And countless other units. It would be fine if Kolya didn't reappear with an army larger than before. How do I proceed? Has anyone else beaten this?