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

I can't say anything about the strength of the Dwarves, as I haven't played much with or against them. As for the other 6 factions... Necropolis, Haven, and Dungeon have always been considered the strongest. After the latest patch, Necropolis has become more challenging, as before, the game revolved around simply accumulating a large number of skeleton archers, which could overwhelm anything. Now, you need to think about how to develop your hero and which units to recruit into your army, given the limited Town Energy. Playing as them has become more difficult, but whether they have become weaker... probably, but they are still strong and dangerous. Haven's training options have been reduced almost as much as Necropolis', making them cheaper but limiting the number of trainable units. You can no longer easily recruit hundreds of crossbowmen, but people are actively training Footmen into Monks and Monks into Knights. So, Haven hasn't been significantly weakened, and perhaps even strengthened. In my opinion, Dungeon rules! Especially since the Luck skill now affects enhanced spells. They only need an army so that the hero can cast as many spells as possible. Usually, after the hero casts one enhanced spell with Luck, it becomes very painful for the opponent. The Academy is strong when it reaches its resources and starts producing mini-arts; without them, their armies struggle. The Inferno... until version 2.1, it was considered the weakest. Archers only become available at level 4. If it weren't for Deleb and her ballista... My favorite, the Elves, are not the favorites, but they are not outsiders either. They have very high-quality units, but a small growth rate (only Dungeon has a smaller growth rate). In general, you can win with any faction; it's just easier with some than with others.