Sylvan vs. Necropolis

I'm sure it was an interesting game on a great map, and I think that's why we play Heroes. In your description, I don't understand why your main opponent, Kaspar, had a ridiculously small army, and why you first write that he has vampires, but then they're not in the actual battle?
In my opinion, the Elves have a much lower chance of winning in a rush compared to the Necromancers, although of course it's possible. In percentage terms, it's 20% to 80%.

I made a typo about the vampires; he didn't have any. I completely agree; I also think the odds are 80/20 in favor of the Necromancer. I want to add that the Necromancer also seems to have leveled up a Ballista, as it took down quite a few cavalry and dancers.

Added 4 minutes ago

If Wing is level 12 and has a lot of archers, I think it wasn't difficult for him to kill neutral creatures like Forest Archers + the Ring of the Dragon's Eye == the result is, divide the archers and go ahead, and you won't lose anyone)). What's so complicated about that?

Yes, Ereb is absolutely right)). Thanks to Wing's level and the ring, I easily cleared the Forest Archers on auto-battle. Of course, I divided the archers and dryads. It was difficult when Wing was still small and didn't have the ring to pierce through the crowd of spirits and druids. That's where it required skillful technique. I'm not a super great Heroes 5 player, but lately I've gotten good at playing as Elves, as they are my favorite.

Added 5 minutes ago

however, the Elf was very lucky with Wing)))

Yes, very lucky)). Initially, I took Ossir for meat. But when I saw the Eye on my hero, I realized that I could do anything!)) Or almost anything.))