I don't recommend air pillows as they don't do anything as far as I am concerned.
- They don't do much for expansion as they float on the surface of the water
You can't make a teepee out of the cover by stretching it tight because it voids the warranty of the cover (read the box)
I think they just add another wear point to the cover.
I recommend using the wire and winch and if you have high winds you can use a pallet stretch wrap to stop the cover from blowing up.
When using a wire and winch make sure not to have the wire ontop of the skimmer or return when tightening or you can do damage, if you have some extra slack in the cover you can rollup up the cover under the wire so that the wire itself isn't touching the pool but actually has a layer of cover as padding.