(Dungeon + Necropolis) vs (Sylvan + Orcs)

Well, regarding the Fire Lord, I don't think the Wood Elf will counter it because he can simply ignore it. It's just one ability; there's also the Lord of Lightning and Cold. Unless the Wood Elf knows the Warlock's upgrade plan. In general, the Fire Lord will be very useful with the Wood Elf's high defense. He seems to have forgotten about the Wall of Fire... Maybe he's not used to the fact that it's been moved from the summoning list. The spell is extremely useful; if it's available, it makes sense to take Assassins and attack the archers. It's their turn, and they first take damage from the poison, then make their move, and then get hit by the Wall of Fire. Although, if there are more than 200 Assassins, it's better to attack the dragons; three of them will definitely die. But it depends on personal preference; you can also use Hunters, but they still need to reach the enemy. It's difficult to upgrade Tactics for the Wood Elf due to the low chance of the "Attack" skill appearing. He might not even go for it. And the Dark Elf will lose several levels.

Added 5 minutes ago
Oh, no, there's also Pyrokinesis! So, it turns out that the archers first take damage from the poison, then from the Wall of Fire, on the next turn again from the poison, again from the Wall of Fire, but also from Pyrokinesis?! That's intense! They are weak on their own, so they won't last long...

Added 55 seconds ago
Oh, no, there's also Pyrokinesis! So, it turns out that the archers first take damage from the poison, then from the Wall of Fire, on the next turn again from the poison, again from the Wall of Fire, but also from Pyrokinesis?! That's intense! They are weak on their own, so they won't last long...