We negotiated a lot for Necropolis; the opponent gave me a red Necromancer for around 8000. I managed to break through with 121 green units, including 400 skeletons, ducks, and some angels. I attacked without using Animate, as I was prioritizing land units for Gosh. In the center, I slowly took the central town. In the Utopia, which the opponent could theoretically have taken, there were Knights and Champions; after taking them, even Hack's high stats couldn't save him. Hack retreated to his spawn to take Utopias, and I took the opportunity to expand and break through to two more spawns. It seems Hack didn't find a way to control the situation; it was a quick game.
I think that at our level, it's worth negotiating for Necropolis and going up to 10k.
http://twitch.tv/zelen_11_rus