Yes, indeed, there's not enough mana, and there are too few bullets. Because the crate with bullets inevitably perishes under the attacks of the Nagas. Moreover, I personally won on the second try (my brother on the fifth). You need to cast spells skillfully. And that's exactly what I'm practicing. The army doesn't play the main role here. Although, it depends on how you look at it. But besides the Eyes and Harpies, you don't really need anyone else. The main thing is to slow them down and blind them. And then it's just a matter of technique. And summoning "golems" – I mean the earth elementals. There's really nothing else to summon there. I hoped that those who have actually played would understand me correctly:rolleyes:
Using magic, I managed to defeat 750 Manticores in the same way. The only difference is that the elemental packs have seven or eight units, and everything is fine, with no losses. Magic is cool;)
A naive question: how many people did you kill in the process??? And what month was it, and how many of these corpses were there? (I mean the dead knights)

In general, maybe I didn't quite grasp the essence of the question?:D (I haven't finished the map yet, but I think it's just a matter of time;))