Plug Most Power Efficient Custom rom for Droid Razr Verizon?

I recently bought Verizon Droid Razr XT912 (GSM Version). It has stock JB pre installed and it had many bloatware pre installed. I am getting horrible battery life . Battery doesn't even last few hours on standby. So I rooted it and now I want to install custom rom on it so that (maybe) I can get a better battery life.

So what is the most stable and power efficient custom rom that you have used. I understand that there are two versions of droid razr xt912. One is CDMA and other is GSM. I have verizon GSM version as I am using it in Pakistan with a local sim card.