What should I do?

I have a question. I'm playing on a large map as Sylvan, with 6 opponents. It's the end of the second week. The Dark Elves are located very close to me, and their hero headed towards my castle. I met him halfway to the castle and successfully destroyed him, then another one, and, deciding not to stop, I attacked their castle (the danger level was low). But there were three towers in the castle!((( They methodically decimated the core of my army - archers :( (upgraded). I won, of course, but only 6 unicorns, 16 druids, and 12 dryads remained in my army. I lost 40 archers((( 60 dancers, and 80 dryads (don't think of me as a noob, their city had 3 black dragons, 6 upgraded hydras, 12 upgraded riders, 21 upgraded minotaurs, and some others I don't remember). How can I get out of this situation? :confused: Should I create a second hero for the Dark Elves or combine the army from two cities for my main hero?
:smile17: