"Weak demons"??

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MasteR

Well, if you just deploy all your troops to fight against archers, everyone will suffer losses.

But if you don't deploy them, who will fight?

MasteR

Regarding the Tower faction:
Furies can easily handle large numbers of slow infantry from the very beginning of the game without any losses. Stalkers can already fight archers with hero support from the start. If there are many enemies and few stalkers, you can create several small squads from the latter and use them to retaliate against enemies or disrupt their attacks.

Fighting slow infantry isn't difficult for many, and it won't cause demons much trouble either; summoned creatures can take the brunt of the attack.
Only a dragon can reach single archers from the Tower faction on the first try, if it doesn't have any additional speed. So, no matter what, they will also suffer losses.

MasteR

With the Elves, you don't even need to worry and can afford to trade away a dozen fairies/fighters. Once archers appear, everything will become easier.

It will become easier with everything later, but losses are quite acceptable at the beginning. No one can win flawlessly.

MasteR