[Galaxy Note 8.0 (Tablet) Q&A, Help & Troubleshooti] gooberdude:
Gosh, I have been posting bits here and there, and nobody cares until now. HA!

OK, I will do a simple rundown.

OEM or stock firmware only.

Saferoot

Xposed framework

Wanam Xposed

Startup Manager for Xposed

Greenify Plus for Xposed.

Geenify

Security 360 Antivirus (Very robust app for its size, like having 5 apps in one)

Trickster Mod Pro

RootCloak and Substrate (Non-Xposed version)

Now that I have the main components listed, what to do.

Turn off in Application Manager... Will require swiping all the way to All.

Google Play Music - If updated you will need to uninstall before turning off.

Google Contacts Sync

Briefing

Clock (digital)

Favorite Apps

Flipboard

World Clock

Yahoo! Finance

Yahoo! News

In Greenify, tap on menu. I have added an Xposed module to make all apps have a three dot or line menu, so you may not see the menu without it, as I have no clue to what any app looks like without the xposed module running. There should be an option to create a shortcut. It will place an automated greenify all launcher. It will greenify any app that can be put to sleep. In settings you can do experimental options to greenify.

Both greenify and security 360 have a sleep or end function, they work together at eliminating apps from running in background and memory starvation.

If you find an app that is always running after boot up that you may not be able to manage in either app, Startup Manager in Xposed may offer a startup disable for the app, though not all apps are covered in the list. It is fairly simple just tap on the app and once it is highlighted it will not start during startup.

Security 360 will allow further actions, though it has an easier interface than greenify. You can add both user apps and system apps to the ignore list or remove them as well.

I would be very careful on removing system apps from the default list.

With all that set I keep everything setup automated... email, wifi, and syncing.

Though I keep my google account setup to not do much but sync calender for syncing Samsung calender simultaneously.

Once you kill all the google automation in your online google account... you may remove Google +, as I never liked it and don't use it, the options on your tablet will be in effect, so make sure what settings you have on your tablet are what you want before making online changes.

I left Samsung account active so I can get automated updates. With everything else pretty much running nicely without any glitches.

I have my powersaver setup with everything enabled, and no automatic dimming. Pretty much like the previous poster I commented on. 20% is more than enough for my viewing conditions.

With my settings the way they are, I use the tablet without thinking of turning this or that on unless I am using miracast or file sharing.

PS... I have GPS on for apps that require it. Even though it is enabled, it is off until I start an app that needs GPS location info. It seems only 4 apps that I use pull from GPS. Google Maps, HD widgets,YP, and a Navi app. I have disabled internet location settings, as they are unimportant. Knowing which apps will pull location info during use makes it easier to control location than expecting games and browsers tell me what they are doing.