The essence of the tactics when playing as the Dark Elves.

On a large map, the chances of winning will be lower. I would try to negotiate for at least a medium-sized map, and then chaos will be especially strong. If the map is still large, you can try summoning with Fog Cloud and defense (if it appears) with Dodge, as the Elven Archers are deadly. Logistics with a surprise attack is also possible – for example, teleporting Hydras and Minotaurs if the archers are not well-protected, or teleporting Lizard Riders if you choose the hero Sorgan, with the idea of teleporting them so beautifully that they can bite.
All of this, of course, is just my opinion, and it may very well be incorrect. I don't consider myself a great expert in playing as Dark Elves.