I am running SkyICS 4.2a-8 and I am sitting at 33hrs with 38% battery life left.
Battery fully charged and then CWM wipe battery stats.
Fully drained battery and then full charged again.
These are the results.
Screen - 33%
WiFi on, Bluetooth on
I haven't tried superlite yet, but it's on my list. I have had such great luck with SkyICS I am having a hard time switching.