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

It's hard to give a definitive answer. :)
I'm voting for Haven because they dominate in long games due to their preparation! :)
Necropolis is also strong in long games, but Haven is stronger!

And in short and medium games, Warlocks with a developed Chaos skill are definitely the strongest! ;)

Dwarves are also strong because of their runes, but they will definitely be nerfed. ;)