Using device_idle_constants under global settings, nougat can doze sooner than usual, and with specific settings. No root required. The screenshot is the drain of 4% battery over about 7 hours of sleep, which equates to about -0.57% an hour sleeping.
This app does require the secure settings permission. The app will tell you have to do this via ADB.
The full configuration is here for those who want to know: