Mish-gan
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Firstly, if you're playing with a friend, there's an option for autosaving – or were you unaware of it?
Secondly, your categorical statement suggests that you haven't played against a decent Necromancer; you've only played against some noob... Especially if he was defeating you with two Castles while you only had one Castle.
I didn't know; I haven't played Heroes of Might and Magic 3 because my internet connection isn't good enough, but my friends used to play it all the time. They often started long games, but they rarely reached the endgame due to constant crashes, either on one side or the other. What's the point of spending three hours developing, only to have it all ruined by a crash on the fourth attempt? It's a complete waste of time, and I've already said that rushing isn't a reliable indicator of a good or bad game, and it's simply impossible to determine which faction is stronger! But the main point is that if you're playing with friends, it's better to do it over a local network, and that's a fact!
I'm tired of arguing; believe what you want, but I know for sure who's stronger because I've tested the matchup between Dwarves and Necromancers many times, but you, it seems, have no idea about the real situation! I don't think my friends are "noobs," and their experience in Heroes of Might and Magic proves it. In fact, I'm very grateful to them for introducing me to this wonderful game a year ago!
Added 3 minutes ago
For Mish-gan: Why aren't all players using Humans in Heroes of Might and Magic 3 then? Probably because they can be rushed, and it's really possible to train a lot of Paladins on large, resource-rich maps. And by the way, having a lot of horses isn't a guarantee of victory; there are spells like Blindness, Charm, Berserk, and Holy Vengeance.
And while the start for Igvar is fast, it's not reliable. You'll almost certainly suffer some losses on every neutral creature stack, even if it's just a few. Although, maybe on Veteran difficulty, you can clear them without significant losses.
It's hard for me to add anything else since you don't seem to grasp obvious things!
Added 4 minutes ago
Now imagine a late-game scenario with a Necromancer at level 25 with two Castles, while you only have one. I don't know how you could possibly lose. I've tried playing Necromancer with two Castles against a Mage and a Demon, who weren't fighting each other. I defeated both of them with almost no losses, and I even taunted them – I didn't use Berserk or Charm. There was so much undead amassed that it would have been enough to defeat a Dwarf as well. And the fact that Mages are stronger is undeniable – where else are you going to get so much resistance, luck, and initiative?:confused: :confused: Now imagine a terrifying scenario – the Necromancer has good artifacts (Ice Shield (a must-have), Cursed Ring, Set of Death, a couple of items from Sar-Iss) and an army three to four times larger. What will you do? Use Light and Blessed? Even Slow won't help. Nothing will help – not runes, not magic. I think I'll try playing Necromancer against a Dwarf 2v2.
P.S. Don't listen to this mish-gun; he clearly only plays against noobs.
Try it, and share a save file from the endgame!
P.S.: No comment!