You need to use 2 + 6 (City Fixtures), that will lets the air get to all the faucets. "Normal" is for flow from the water tank.
2 + 4 will be used to suck antifreeze into the lines from the jug (if you're going to use it), I actually do both, blow out the lines, then pump antifreeze in, just in case and to be safe. And I'm South of you.
I figure, it's cheaper and less time consuming to use AF, compared to searching out and fixing a broken water fitting that froze and the water damage caused by that leak.