Go to Settings/Privacy/Privacy Guard

Tap onto 3 dots > advanced >

[B][COLOR=red]Disable Wake Up[/COLOR] + [COLOR=blue]Keep Awake[/COLOR] + [COLOR=green]Auto Start[/COLOR] permission for below system app:[/B][B]

-[B]Google Play Services
-Google Services Framework
-Contacts (Keep Awake only)
-Location Services (Keep Awake & Auto Start only)
-Google Search
-cLock
-News & Weather (Keep Awake only)
-Gallery (Keep Awake & Auto Start only)
-Phone (Wake Up & Keep Awake only, DO NOT disable Auto Start) (This saves you from RILJ wakelock)
-Calendar & Calendar Storage (Keep Awake & Wake Up only)[/B]

The above apps i mentioned is the critical item that [/B]do have affect on your background services, even-though you [B]disable some of their permission but still they work fine if you need them[/B], nothing breaks i can assure you, as ive done extensive test with all those permission in Privacy Guard. There are some other apps you can alter the permission but its up to you, like Hangouts & Hangouts Dialer is a battery sucker, so take note that you can disable their permission too if you not using it, i never highlighted those because its your choice.

And after you finishes installing ALL your apps from Playstore/Backup, proceed back to Privacy Guard, disable some permission (of your installed apps) which you dont require them to do. Like Facebook/Instagram/Twitter, i disable the Keep Awake & Wake Up & Auto Start. But some of you might think it'll breaks notification so it's up to you.