Yes, focus on local elections but the rest of it is bogus. A third party only ensures the continued domination of the Democrats and their anti-Western/Christian/American/whatever agenda. The GOP itself only exists because the Whigs folded under and completely disappeared. You can take over the Republican Party and win as Theodore Roosevelt did in 1904 but you can't win by fracturing forces -- all Roosevelt did in 1912 with the Bull Moose Party was give Woodrow Wilson an undeserved win.
You seem to assume that everyone registered as Unaffiliated (the American Independent Party is a whole other beast as some idiot celebrities in California just found out) would vote Libertarian. That just isn't so. There are some of us unaffiliateds that think Gary Johnson or Rand Paul are as off their rocker on certain issues as we think Mitch McConnell needs to join Boehner in retirement.