Sylvan vs. Necropolis

I disagree, especially since Haven will essentially have more units than the Elves! The damage from spells against enemies will be insane! 50%-50% (IMO!)

Do you think Haven will have more initiative in the final battle than Wing? I doubt it. It's very easy to reduce initiative. Just use a Cloak of Death, Staff of the Underworld + Banshee's Cry + mass slow. I agree that the damage dealt by Elves to sworn enemies will be significant, but you still have to get to the sworn enemies, and with 50%-70% reduced initiative, -11 defense, and berserk, it will be difficult to do. I don't know, maybe I'm wrong, but Wing, in my opinion, is a stronger hero than Haven, and with 2 castles and a good setup, Wing can be defeated by Necromancers without any problems.