Code:
sudo apt install cpupower-gui
It makes tweaking CPU use pretty easy, back in the Nokia N900 days this was done more for performance ie:overclocking the CPU and GPU, but on Rockchip and Allwinner I feel like we are more interested in battery life.
With some experimentation I think we can come up with some great battery life saving while still having a phone awake enough to catch phone calls, you can put the GUI in favorites when mobile apps only is enabled to have quick access. I am enabling balanced mode and will give it a week or so of trial on my Rockchip CPU PPp daily driver phone.
What is nice is with a long press from the desktop you can choose presets without launching the app.