Which units would you replace in the Dark Elf faction?

Please forgive me, but I completely disagree.

The large size increases the number of targets for attack (6 out of 10 cells is significant).
When attacking with momentum (having moved 5 or more cells), it COMPLETELY ignores the target's defense. Combined with high attack and damage stats (which is amazing for a 4th-level unit). And heroes usually don't complain about having high attack stats.
Very high speed and initiative.
The Lizard's Bite is very effective, especially when the hero is Sörgal. (With eight Riders and five Furies under Sörgal, I can easily handle a crowd of any monsters up to level 6, except for Paladins).

And they are incredibly powerful in the final battle.

In my opinion, they are the most "evil" 4th-level unit in the game when you have 20 of them.

Maybe you just haven't figured out how to use them effectively;
Or maybe you simply don't like them for aesthetic reasons:smile30:

As for the low defense stat, if you increase their defense, it would be overpowered.