Why don't you guys have a fight, and whoever wins will be right.

Man, I'd love to. But I can't play Heroes right now. If I start playing, I'll end up sitting around all day again, from morning till night, not doing anything useful. That's why I'm on the forum, sharing my accumulated experience. And I have the most experience with the Elves.

Ramzez, do you think no one knows about your summoned swords and crystals?

I hardly use them, especially the swords: when clearing out neutrals, I use the Hornet Swarm and summoning as a priority. And in battles with enemy heroes, there's no time for swords and crystals either. What's the bug you're talking about?

And summoning is only available to Dyrael, the others have a small chance of getting it, there are many risks in this tactic, so it doesn't pay off!

I absolutely agree: going for summoning against Necromancers with other heroes is idiotic. With Dyrael, the trick is in the fast start. In general, light magic is better against Necromancers. But the fast start compensates for this advantage. I think it's reasonable to play with slightly less suitable magic, but with much faster progress. You need to get to the Necromancers as quickly as possible.

Added 2 hours 37 minutes ago
I just posted a development strategy for Dyrael in the fast start thread: 1. Fire Warriors, 2. Wisdom with Attraction or Defense with Last Stand - whichever we get first, it doesn't really matter. 3. Logistics. This is what you need for a fast start, no matter who you play.
And the last skill is specifically for undead: light or dark magic. In total, the probability of getting it is 10%, which is enough. We get an anti-hero: we limit summoning with Elemental Balance, and dark magic with Dark Seals or Light. The main thing is a hyper-fast start, and the Necromancer simply won't have time to get the Shout of Horror.