Default [Q] dissapointing battery life on Paranoid Android Beta 5

I have kept the screen brightness at the lowest of the low, only turned on data when needed, and still my battery can't have more than 2:50 of screen on time before the battery dies (1%). I am assuming stock rom is most likely the best for battery life, but I require some custom features that only non-stock roms have. So what I am asking is, what else can I do to improve the battery, or what other roms have good battery life for Nexus 5

Thanks