In your opinion, which faction is the strongest in Heroes 5? Let's discuss the advantages and disadvantages of each faction.

I think people aren't very strong in late-game battles against Necropolis! Even training halls don't help! We were playing, I was Necropolis, and my friend was Haven, and what happened! The result was that he only killed dragons and zombies, he didn't touch anything else! There was no chance of winning, even though my friend is pretty good at Haven! I didn't even use dark magic much there! What's there to use? Just mind control on the paladins, and that's it! I also did a general slow and Banshee's Wail, and that's it! But people are strong, although I haven't fully understood their strength yet!