How can I possibly beat this map? I'm playing First Blood, version 1.9a. Yesterday, on the second day, I went to Inferno, managed to defeat the Archdevils and two groups of Phoenixes, but my army took some damage. And then, right after I built a level 1 Mage Guild, that jerk (the Necromancer) teleported in and almost wiped me out with minimal losses on his side. I lost, and the game was over. I'm so tired of losing (I mean, after the defeat, they show the cutscene where his head is cut off). Please, tell me how to beat it... Give me a little bit of hope, and I'll finally get some peaceful nights back...

You're right, there's only one tactic here. So, let me give you some advice:
- With Dess, you definitely need to run to the top (after studying Clone and Healing, and also collect the Admiral's Hat - this way you can hide from the Necromancers in the water, if there isn't a magic garrison there, as in version 2.4).
- Foresight is already available to the hero with the Angels (I also barely managed to learn Restoration using Foresight; my army was almost destroyed, but in the next battle, I showed those Necromancers who's boss).
- I advise you to make a new hero your main one (I think I took someone from the Logistics).
- And you definitely need a hero with Literacy (Expert Literacy, of course).
- Also, I'll add that it will be very difficult without Water Magic (believe me :D)