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

INFERNO IS TRASH, D

Inferno has the ability to open gates, and when combined with Urgash's call + wide gates + fast gate opening, it becomes a unique advantage. Also, they have Chaos and Darkness spells in their guild of mages, and a lot of knowledge. For example, at level 23, the hero had 190 mana.