I'm in the same boat as you.... After reading up on some other posts I've decided to make a profile with 245 min and max on screen off, with 1.3 max and 245 min with the ondemand govenor.... but on that same note I am running Bamf Remix 1.6 and still somewhat unsure if I should focus on Bamf toolbox or SetCPU for my settings
edit: on one of the posts I read somebody with this setting said they got 20-30 hours on a charge... not sure on the truth of this but ill try and find a link
.... and here it is!
Major battery issues w/ new radio +BAMF - Android Forums
I keep my phone set at 245 min and 1036 max, and my kernel is 4.4.2 bamf kernel (adrynaline's) currently - so the 1036 is undervolted, bc the kernel is undervolted up to something like 1400 or whatever.
i am running bamf with the ondemand gov.
i am not using a screen off profile currently, bc i use my phone pretty hard sometimes with the screen off (gps + other stuff). but if i were using a screen off profile, i would do something like 245 min 600 max, with on demand, just to reduce lag a little and make sure things work correctly as much as possible (but with testing you will see what works for your phone and what does not). if you get fc's you should probably raise your max settings, basically.
and there are the advanced settings which are a little more complicated and i'm not sure how much battery you will save by adjusting them since the governor's typically handle them, but you could do a search about the advanced settings and find what to read, either here or at xda.
btw i get fair battery life with everything on (gps sync etc) on the stock battery, running bamf 1.5 with 4.4.2 kernel or protekk's beta 4 battery sipper kernel, which is based on adrynaline's kernel but more relaxed on battery consumption supposedly.