Listen, comrade Radik. The only map I can't beat is First Blood 1.9. It's just full of frustrating moments. Tell me how you managed to complete it, and I'll be very grateful.
I think it's unlikely that anyone will beat this map on their first few tries.

Comrade Malysh. You're right about the frustrating moments. I completed this map a long time ago (I think it was in March) and I don't remember all the details or the map version. I beat it on my third try.
Here's what I remember:
- the most difficult part is surviving in the first few months (until you defeat the undead);
- I abandoned the Citadel castles and fled north with Dessoy, after first learning some magic;
- with the help of what seemed like a useless skill like Keen Sight, I learned Restoration and, I think, Blindness, and things started to improve;
- at the end of each day, I made saves and used them to make sure that Gunnar went to the Citadels and not to the Angels;
- one of the key roles is played by Inferno (or rather, the castle gates);
- and of course, the battle with the last hero (in principle, it's not particularly difficult) - there are two options:
1) fast-forward the days and build up your army;
2) engage in terrorism - attack with a hero and one Archangel, cause an explosion, and run away, and do this until you weaken the army (I think I killed all the Champions, Medusas, and Minotaurs), and then attack with your main forces. This option is for a speedrun. I don't remember exactly how long it took me, but it was something around 240 days.