Can confirm that modifying processor options (scheduler/frequency), or altogether disabling CPU stand-by has no noticeable effect on power dissipation.
Remarkably, stopping the droid-hal-init.service, which kills all those suspiciously dodgy /vendor/bin/hw/android.hardware… processes, results in a significant increase of battery drain (by about 2x). This disables a bunch of things, such as the display, so have a care. Also, it does not appear the service can be restarted easily, so the whole device must be. Surely because systemd is so wonderful.
Any idea whether there are /sys (or /proc) files controlling the power state of the various peripherals? Considering the average current draw during stand-by (display off) is about 30 mA, while it should presumably be less than 5, something is probably not being powered down. Such as a radio.