Level 1, Fairies and Dryads - leave them.
2. For level 2, I would bring back the Tigers. Throw stones if you want, but I like them more than the Dancers.
3. Archers - leave them! Level 3 - they should be here!
4. Let Unicorns be here instead of Druids.
5. And here, Druids should be. They are more valuable than Unicorns.
6. I would remove the Ents; they don't suit the faction. On level 6, it would be good to have something like Werewolves or Eagle Riders in the Sylvan Castle =))
7. Magic Dragons.