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In my opinion, the most effective starting strategy for Demons involves Delebb, and if Grog appears in the tavern right away, these two can catch the opponent off guard, which is essentially their goal. Demon units often overwhelm the opponent with their high initiative, so the primary task is to exert maximum pressure and deprive the opponent of space on the battlefield. There are also characters like Jezebeth, Grol, and Alastor in the Demon faction, who can become decent Dark or Chaos mages, but this requires effort to acquire spells and knowledge, as well as collect the corresponding artifacts. Creating a phantom works very well. For the late game, I think Nimue is a good choice, as she can overwhelm with sheer numbers, against any opponent. If your opponent is a mage, Marbas can be effective in the late game due to his ability. Overall, the faction is not bad, but in my opinion, the chances of winning in the late game are not as high, especially against defensive builds of Dwarves or Elves, which rely on a solid defense or preparedness. Therefore, it is important to pressure the opponent early on.