What's your best configuration for battery/performance topic

Hi guys
I switched to ART... and BOOM my nexus now is very very good...
I flashed bricked kernel and setted mdpdecision
stock ROM
no overclock
no undervolt
I have 22 hours of battery, 3 hours of screen and 1 hour of call
what's your best configuration? and how I can modify mine to improve?
tnx to all of you