Strategy on attacking lvl 10 turrets

I'm looking both for strategies on attacking cities with 15 lvl 10 turrets as well as number of units necessary to successfully carry out these strategies. Any assistance would be appreciated!

Hi there. Something very similar has been recently posted here. Please follow that link as it has several peoples opinions on what they think Is best.

As max said it was recently discussed, also look in the guide section you will find loads of different strategies.