I'm not having this huge battery drain...
Are you using the "original" rom configuration?
I ask this because the simple change of Lancher may cause a battery drain or the installation of other apps.
With a regular rom (like the uploaded one) and installing only FaceBook, Adobe Reader, Whatspp and similar apps my battery is ok, no drain...
If someone wants help, please write a configuration (installed apps, tweaks added, init.d scripts, etc etc). Thank you for collaboration.