Ranger – “Defense” [Campaign 5, Mission 3]

Thank you all for the information. After reading the advice, I completed this mission in 15 minutes. Perhaps I found a method that no one mentioned. My game is not a licensed version, and the version is 1.0, as I understand. The sequence is as follows:
The mercenary stays in the city, Fedya recaptures the second elven city, and together they form the necessary quorum in the capital, and Fedya goes to free the prisoners: first, the one on top, then the one underground. The first freed hero was not used in any way; he stood where he was rescued, and therefore did not gain any experience. I didn't touch the necropolis city; I went straight underground. After freeing the second hero, that's it, the end. Thank you for rekindling my interest! I was about to delete the game...