Start off with one swordwrath and one archidon. Then after a while make some speartons. Then you can make giants and set your speartons to shield wall so your giants and archidons can pick off the enemies. Then attack. You will easily be able to take out the miners and defenses without getting taken out by the castle archers. Just make sure you conquer the middle in the beginning so you can get ghost units. If you fail in the beginning it will be very difficult to survive.

wont work against allbows and giants