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He correctly chose defense and attack.
You don't know what a Necropolis hero with leadership is capable of, especially on the maps.
It's okay, I also played against one such player. He was also heavily buffed and participated in tournaments. And nothing, I won, and not just once. So you have вполне real chances. If you can't defeat him immediately, buy time, build up your army. Or just agree with him on a certain period, without tricks and other nonsense.
Defense - yes. As for attack, I don't know. I haven't tried it if I had a choice not to take it. I need to test it.
Leadership, you say? Well, I don't know, are the maps really that big with a lot of neutrals? It seems I was mistaken, I apologize.
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But mass slow and dispel are very good. Apparently, he wins solely by taking utopias for artifacts.
Whatever