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The graphics in the 4th installment are good, but some units are poorly drawn; I would even say they are simplistic. I don't like the elves in rags and half of the barbarian units, which look more like homeless people than warriors, especially the berserkers. In the 3rd installment, the barbarians are better, in my opinion... and the fog of war was unnecessary.
As for the ideal heroes, it would be a mix of the 5th and 4th installments.
Be strong. Believe