Miner cities SUCK!!! You can get a better economy than them if you get the middle, plus you have ghost, small army (they have 3 castle archers instead), so you have the advantage. Why is it so hard to beat them?

No, 6 Albowtrosses or more, 3 GIants and 2 Merics plus a Ghost Giant.

The mistake they make is making 3 castle archer.
For me, 1 castle archer, wall and spam miners lol

For some reason you like to end your words with lol.

Quote from ShadowyWhisper

For some reason you like to end your words with lol.

I know lol

Well anyone who bought 3 castle archers are spending 1900 gold.

But da splash damage, mon.

If there's going to do that, then they would not have have anything to defend themselves besides walls and castle archers. Just put pressure on them throughout the game. If they're trying to giant mass doing this, then they will be defenseless for the first 5 minutes of the game. Use that to your advantage.

-3- how do they start off?

By 1 Castle/Miner.

Big maps: either 2 miners, than after the first 2 miners finish mining, buy castle archer. OR, buy 3 miners, and wait until you have 300 gold.