I tried Greenify with some success and I changed the CPU governor to battery saver, but I'm still wayyyy behind where I was with CM 10.2. Hopefully they'll fix the problem soon as I'm pretty sure the OS is the cause.
I'm having the same exact problem with my phone since it updated from CM 10.2 to 11. From what I can tell it seems to be constantly awake, but I can't figure out whether it's the OS or an errant app.