Quick update - After spending weeks on end, trying to turn off multiple parameters, I've now given up and I'm moving to the acceptance stage. Things that I have done are:
- Updated parameters under pmset (tcpkeepalive, standbydelaylow, standbydelayhigh)
- Updated parameters within a plist file, as explained here: source
- Turned on DND setting from 10pm to 10am with the option "When Display is sleeping"
- Disabled all sorts of 'Sharing' from the system preferences menu
- Disabled 'Power Nap' and 'Wake for Wi-Fi network access' from Energy Saver under system preferences (although, now I notice one of these settings has removed the option for 'power nap'
) - Disabled 'Find My' from my iCloud account setting
- I now manually turn off the Wi-fi and bluetooth before shutting the lid - need to see if there is a script for this too, since I forget to turn them off sometimes.