Create a massive multilplayer online game for IOS devices - repost

I want to create a game that requires users to build their city/castle/town and battles troops against other users. The game will need to integrate with game centre. Think of clash of clans except different. I can provide all necessary scope details. Only apply if you have experience in this game and can show me your product. The game will be in 2.5D and will require graphics to be compatible with Android in the future development stage