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Sandro's Cloak + SA + Righteous Wrath + Mind Lord + mini artifacts for Initiative and regular artifacts for Initiative. An example: Ring of Swiftness + Haste + mini Initiative + Acceleration + Slow + Staff of the Underworld = 160% Initiative difference^^). I don't think the Necromancer ever gets a turn. Even if we exclude the Initiative artifacts, mass acceleration + mass slowdown + mini artifacts = 100% Initiative difference. And it would be good to find a Dwarven Shield. Thanks to the artifact shop in our castle, we have a good chance of finding something.
And yet, the Necromancer is a very difficult opponent against us, at all stages of the game. If we find Sandro's Cloak, we can end the game; if not, we'll have to work hard, or maybe just lose xDDDD. Overall, I still think we have a pretty good chance, at least 50/50. And the Seal of Darkness with Eternal Light is also good).