Dryads, no way! But Ents... they have 190 health, I think, while Dusk Witches, for example, have 90... and both are level 6 units...
Added 2 minutes later
I agree! Dryads are good, either with their swarm or with their attack, and they can attack several units at once... As for the health of Treants, everything is normal, they specialize in defense and holding back the enemy's attack, and their damage is almost the same as that of Unicorns...