Which units would you replace in the Sylvan castle?

I disagree with those who think that the Blade Dancers and their upgrades should be removed from the Sylvan faction. Are you guys crazy?! This is a pretty strong unit for a tier 2 unit! Compare the stats of the Blade Dancers with the stats of the Orcish Warriors (not counting the Blood Rage bonus). Who is stronger? I think the main reason for the low survivability of the "dancers" is their low weekly growth rate (only 9) compared to the weekly growth rate of the Orcs, which is 11. I agree that the Orcish race vitally needs a large number of warriors, as this race lacks magic. But why not also increase the weekly growth rate of the Blade Dancers? Or add a building to the arena that increases the weekly growth rate, say by 2? I think this is better than removing such a cool unit. Besides, the AI prefers to attack these melee fighters first, rather than Unicorns or Ents.