I know these times may seem gloomy as the modders work ham on bypassing those server checks with the latest version of Castle Clash. To try to bring a little happy in your day, I found a fix to a lovely virtual machine that supposedly isn't compatible with the latest patch and will share with you, GameGuardians!!
CASTLE CLASH PLAY STORE LINK:
http://www.genymotion.com/ (requires virtual box, windows versions can come with vb)
This is Video 2 showing you how to clone your new factory image!