Comparing your and mine, my battery is pretty crap, isn't it?
I also have that much brightness and I have the app refresh on, but only for things I actually use, such as 3 or 4 applications.Haha yeah I guess so. Have you tried turning off Background App Refresh? This has saved me a lot of battery by turning things off I don't need.
I also use about 40-50% brightness all the time and keep Bluetooth off most of the time as well.