I'm doing well with battery, I'll be honest I don't understand screen on time and all that, but I'll learn.
I did change kernels to elemental, stopped many Google services from syncing, keep Wi-Fi off unless at home, and use battery saver option for location.
I also disable Google Now, OK Google (hot word detection), when I really don't need them, such as work hours or when home with all of my other devices. Some would argue this defeats the need for a smartphone, but I say why allow the phone to constantly search for notifications, emails, etc.. When you're home or working when you really don't need them.
Posted via Nexus 5