Sylvan Elves versus Demons.

Pff, how much can a demon even cast? His elves will take them down in 2 turns within 2-3 months with luck, cursed, and speed aura. And the chance of encountering resistance is high.

Luck, cursed, and speed aura, you say?

That's why I don't see the point in choosing Darkness. The whole point of the demon is speed. If he just waits for the elf to develop, there's nothing to play.

Added after 1 hour 22 minutes
I just remembered Heroes, played against Wing Daleboy on old friends. In fact, the demon with Chaos is great. The first strike against the elves, yes. But Daleba outpaces Wing in development, due to this, the demons have more meat. In general, I'm not the best player for demons, but I'm sure that a pro can easily defeat an elf, and definitely won't wait 3 months.