I am currently using Pixel Battery Saver and giving max battery life a run for its money using the stock battery.
Here's my build:
Jasmine Rom 2.3.4
Power Saver On
(No greyscale, location still on)
Smart Sync On
Vibration and bottom lights turned off
Pixel Battery Saver (set on High. Highest turns off too many pixels for my liking).
My goal was to get as much battery life without sacrificing any functionality. Using my phone as normal. Games, navigation, the whole shabang. Let's see how it goes