Artine
Android Expert
I think CPU is generally one of the lower consumers of battery. Looking at my cpu stats, it's at max only a few minutes a day compared to minimum or deep sleep. The exception then is CPU heavy apps that are keeping the processor running at top speed for extended periods.
I'd recommend CPU Watchdog, it gives an alarm if an app is using high CPU for extended periods, Better Battery Stats is also very helpful in showing what apps keep waking the phone out of deep sleep. Watchdog has a free lite version, better battery stats is $2.89 in the play store.
Another one I like is Autokiller Memory Optimizer which can be useful for tweaking how and when apps are killed. Its got quite a few tweaks that can be performed that may or may not interfere with the tweaks already present in this ROM so be careful. Also I'd liek to warn against killing off running programs too aggressively as that can be more detrimental than helpful for battery life
https://play.google.com/store/apps/details?id=com.rs.autokiller
https://play.google.com/store/apps/details?id=com.zomut.watchdoglite
https://play.google.com/store/apps/details?id=com.asksven.betterbatterystats
I agree, those apps are wonderful for those tasks. I use CPU Spy personally to see what states my CPU has been in, and for how long. However, there have been warnings against AutoKiller in the past, and Hashtag did put in some tweaks that do take care of killing tasks when the memory usage is too high.