How does NFC Task Launcher toggle Power Saving and how can I get Tasker to do it?
You can create the task in NFC Launcher, install Autoshortcut (https://play.google.com/store/apps/details?id=com.joaomgcd.autoshortcut&amp;hl=en-GB) and then you can call the NFC launcher task within Tasker via the Plugins>Autoshortcut>Configuration>Run Task.

I just got my unrooted Note 2 setup to disable powersaving when on USB power and enable it again when I unplug it :-)