Atrocious battery life with Cyanogenmod 11 on Galaxy S4 mini
These are the settings I use on my phone, which have helped with the power consumption.

Under Performance

-> Processor


CPU governer: ONDEMAND


-> Profile


Power save


General Settings page

-> Location Services: off

-> Bluetooth off

-> Mobile Data (3g): off

There are also some apps that may be helpful, one of which (I've only heard of it not actually used) is called SnapDragon Battery Guru.

If you can't find the performance settings turn on developer options (instructions here)