Thank you OP! It's not quite what I need, but it's lot closer than starting from scratch. I just had a couple questions.
First, the default German plugin included simply says "all," and I can't change the settings because Tasker claims to not find the plugin needed. However, adding the Greenify plugin says something along the lines of "all selected." So are these the same things, or does the "all" of the former actually mean all apps? And if it does, can it be replaced with the English version without causing errors?
And second, if you know from all your testing, does cell only (no data, wifi toggling on use or sync) use less battery than WiFi(with no cell radio on at all) while idle? I ask here only because this answer drastically affects what changes I need to make. (I use Google Voice, and and it's whether I should launch Groove or use call forwarding when both are available.)