IGZ is an alternative to Hamachi, Leaf, and similar programs.

2asm:
But the classes, changed secondary skills, specializations, magic, etc. – this is not what you should strive for!

This is a big misconception. I agree that in TE, the choice is approximately the same as in SoD for the main heroes. But! What is the build in SoD? It's mandatory logistics, attack, defense, tactics, air, and earth! A poor choice. In TE, it is significantly higher, and if you are not offered logistics, you can at least replace it with the Explorer class. The magic in TE is almost equivalent, while in SoD, earth dominates, then air, fire is a rare case, and water is generally an unnecessary magic. In TE, there is much more choice precisely because of the classes, secondary skills, magic, and specializations. And since there is more choice, there is less chance of losing because you were not given something compared to your opponent. I understand that you can argue with me, but the strongest (most, not all, of course) hero players (whether on SoD, TE, fixes, or random maps) are precisely from the forums, where TE dominates. Isn't that an indicator?