Which units would you replace in the Sylvan castle?

This is just my opinion. (Please don't throw stones at me)
Level 1: Keep the Fairies and Dryads.
Level 2: I would bring back the Tigers. Feel free to disagree, but I like them more than the Dancers.
Level 3: Keep the Archers! Level 3 is theirs.
Level 4: Let's have Unicorns here instead of Druids.
Level 5: And here, let's have Druids. They are more valuable than Unicorns.
Level 6: I would remove the Ents; they don't suit the faction. At level 6, it would be good to have something like Werewolves or Eagle Riders in the Sylvan Castle. =))
Level 7: Magic Dragons.