I'm at it again... I stumbled upon Apollo kernel and now using pegasusq governer with sio scheduler and have at least 20% (rough guesstimate) better battery life.
I am using my phone much more as previously - especially phone calls and the 3G coverage is shocking where I am now. Both drain the battery life quite badly.
Before this kernel, I reached 30% by 5pm, now it is up - 50%. screen on time +- 3.5hrs and between 60-90 minutes talktime. This all on a 2000mAh battery.
I am using NeatRom Lite with Apollo Regular 4.9
http://forum.xda-developers.com/showthread.php?t=2291756
I miss the Siyah kernel days on ICS tremendously (2 days battery life) and PhilZ kernel on JB did not deliver as I wished it would. Apollo is very stable - I will be using this for the foreseeable future. If I find time to play, I will tweak it to see if I can get to 1.5 days with the heavy usage and crap 3G.