Against which factions is it easier for demons to fight, and against which is it more difficult?

Demons focus on gating and attacking. They struggle against dwarves (due to their high defense), but they can easily handle orcs. I've already seen comments about Blood Rage. Also, Temptresses (pardon the redundancy) cause a lot of trouble. And Grok... Teleport is incredibly powerful! However, the issue with mages is that they always have more mana than the demons can steal in one go (except for hordes of demons against a low-level mage). Therefore, the mage can cast something. This involves accelerating and protecting the demons. And let's not forget about magic resistance! But all of this is good in the mid-game and late-game. Necromancers, on the other hand, have weak defenses, and it's not difficult for a demon to defeat them.