SetCPU Settings for Battery

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I'm rooted with Zefie's 14.3, in large part to help with battery life. I've followed all the directions I've found for battery life, including deleting everything I don't use, turning off wireless connections, and slowing down the Exchange server connections. I was still struggling to get through a day, so today I downloaded SetCPU, but it hasn't seemed to make a difference, so I'm wondering what settings others use.

I'm currently using ondemand CPU Governor, with max of 400 MHz and Powersave Bias of 700. One of my profiles is Sleep/Standby, which uses the conservative governor and a max of 133 MHz. Any suggestions?

Also, I've heard EDGE uses the battery faster than WiFi data. Is that true? If I have the option, which is better for the battery?