Have you done an FDR? I was hesitant to do so, but it made a big difference, as did turning data off where i have access to wi-fi, and turning of wi-fi and data when i don't need it. GPS is battery intensive as well, so turn it of when its not needed. When your screen is off, turn off data. You can do this with smart actions, or your data wi-fi toggles. It only takes a moment to refresh your email etc. when you turn your screen on, and that little moment of delay is not a problem for me. I have also discovered that i have a much, much stronger 4G connection now than i did with GB. Here's my battery life over the weekend:
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Admittedly, this was with light use, but i NEVER had this kind of battery life before. Good luck!