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1. I meant on level 2.
2. Who wouldn't attack them?
3. It's silly to use fairies to retaliate because that very retaliation will kill them off by 50%. It's also not worth using "slow and dumb" ents to retaliate, as the old ents move very slowly, plus it's a waste to lose them. Blinding is a matter of luck; if you rely on it too much, you might end up taking a beating. As for the dancers, firstly, they're expendable, and secondly, if you have them run a sufficient distance, the losses will be minimal.
4. Who would even focus on attacking the dancers? Elf archers are very strong, and you can build them at the same time as your furies.