Fighting against neutral Sorceresses.

I'm not a super strategist... but armored units are a good option. If I'm not mistaken, they have some protection against magic and ranged attacks.

Archers have too little defense; armored units won't make it, the only hope is griffins (if you have them), and without paladins and inquisitors, it's unlikely you'll get away without significant losses. I can't say anything more. Wait, maybe a very smart strategist will show up and give some worthwhile advice.

They can reach the target in three turns... The thing is, armored units have so much armor that they can withstand it. Another thing is that when they reach the target, arrows won't be raining down on them anymore, but lightning and fireballs will. The third problem is that, as far as I know, druids are quite good at melee combat and can finish off the remaining armored units. But, considering that they are controlled by AI, and it likes to use all its mana on the first turn, there is a chance. Well, and griffins are also good, but armored units are cheaper.