Default [Q] Complete format

On TWRP, which of these can i format to completely erase everything so i can have a clean install of omnirom?
  • Dalvik Chache (Going to wipe)
  • Cache (going to wipe)
  • Systen
  • Data
  • Internal Storage
  • Android Secure

And would anybody tell me if i need to reinstall the asylum kernal to reinstall omnirom after a complete wipe?

Thank youu