Spend **** loads of money on units and you can defeat anyone at anytime! I have just been neaten by someone who has 300 less defence and 200 less attack and I can't beat them unless I spend 600 gold bars on units. Now I have patiently built up my game without spending on 'special' units. So the moral of the story is unless you are stupid enough to spend £200-300 you will get nowhere!!!
WARNING: THIS GAME IS A SCAM!