What's your favorite battery-oriented CPU governor?

Personally, I am really enjoying zzmoove ("relax" profile) on Boeffla kernel. I can't really seem to find another governor that can give me good battery life with such a minimal impact on speed.

Got anything better? Bonus points for your favorite I/O scheduler/readahead buffer settings! :D

I can only choose INTERACTIVE as CPU Governor (Meizu M2 Note rooted)

I already give a try to SetCPU and now I'm using OPG Pro and when I try to put Powersave mode or another one, I can't. I can only choose the interactive mode. Why? Is due my processor?


Smartphone: Meizu M2 Note (rooted)
CPU: ARM Cortex-A53
Processor: AArch64 Processor rev 4 (aarch64)
Hardware: MT6733
Cores: 8
OS: Flyme (based on android 5.1)