Haven vs. Fortress (how to play against dwarves?!)

I'm surprised by how easily advice is given on how to fight against a "late-game" Dwarf. I wonder, have the authors of this advice actually tried their own recommendations in practice? Let's take, for example, the Necromancer – the Dwarf can easily predict when the Necromancer will appear and equip himself with "Antimagic," and then all your Berserkers and summons become useless (and the Dwarf will have more mana). And in general, in my opinion, delaying the inevitable won't save you, and even enhanced training won't help. I recently played a couple of games against a Dwarf (the game ended around the 3rd week), and it was incredibly difficult to defeat him (and the hero wasn't even Ingvar).

I'd like to add something. My friend and I have been playing Heroes online for quite some time. He usually chooses Dwarves, and consequently, plays as the Dwarf faction. We play on randomly generated maps with the following parameters: large size, and the creature level on the map is the second-to-last of the 5 difficulty levels. I started by playing as the Elves, then as the Necromancers. As the Elves, I chose Wingael and selected the "Expert Avenger" skill (4 sworn enemies) + Magic Arrow + Plague + Enhanced Druid Magic – it's a powerful combination when you know in advance who to choose as your sworn enemies. And in general, I could only beat him very rarely. As the Elves, I remember one clear victory when I simply defeated him piece by piece. I caught him on the road, after which he managed to escape and came to my territory. In turn, I went to his castle while he wasn't looking, and as a result, he had to fight against my main hero with a small army because he had captured other cities (which were weak in development) and had to run and buy back his hero. After that, I got tired of losing, and I started trying to play as the Necromancers. With them, I couldn't achieve a clear victory. And it became even more frustrating when I developed much better stats: 10-24-33-24, 5 luck (with artifacts), and he had 4-18-19-20. I lost only in the 1st week (due to capturing mines that were vitally necessary) and in the 4th week (but the losses weren't significant and didn't affect the main core of the army). As the Necromancers, I choose Lucretia, the Vampire Princess (for every 2 levels of the hero, vampires get +1 attack and +1 defense; at level 29, this is already very powerful). And, of course, I maximized the Dark Energy skill and raised as many vampires as possible. Dark Magic is neutralized by Antimagic, as someone correctly pointed out above (Control, Blindness). With an equal number of troops, I lost significantly more at the beginning due to runes. Someone wrote that playing as Humans, you can accumulate a huge group of champions. But this option seems doubtful to me because it's very expensive. And to defeat, for example, 450 Spearman (+1 attack and +1 defense for every second level of the hero) in one go, you would need a very large number of champions (essentially, it's the same as finding the Grail in the second week). So, I don't see a tactic against runes on large maps. Perhaps there's a way to do it with Mages and their mini-artifacts (I just haven't played them in detail, but it still seems doubtful). Perhaps there's a way to fight using Vampire magic, but even if you have advanced spellcasting, you can't cast spells very often, and the runes will still deal a lot of damage to your units