Ranger - "Higher Vampire" [5th Campaign, 5th Mission]

I decided to play the game again – I successfully completed it 2 years ago. But now, I'm stuck on this mission! I can't defeat Vlad, no matter how hard I try, and that means I can't move forward. Please, send me a save file; I'm begging you, to [email protected]! I have Heroes version 1.0. I've already restarted this mission several times; I guess my hero isn't strong enough. I get stuck at the point of building cities because I don't have the Astral Gate spell, and until I gather a large army, I can't get past the first obstacle, but by then it's too late. At most, I capture Orange, everything is underground, and there's one Necropolis city on the surface. And that's it! Vlad arrives with an incredibly powerful army and crushes me like a bug.