HA! What makes you think Libertarians care anything about a Repubican majority. As long as its close enough for the the Republicans and Democrats to have to bicker over everything, then neither side has carte blanche to increase government according to their ideology. I like the stalemate.
You say Libertarians are not some monolithic entity that marches lockstep with the party ideology, but you condemn Republicans and say your a libertarian because they don't? The LP has no track record; you have no idea what they would do if they were actually in power. You think (wish) that when in power, the people are just going to say, yea, go ahead and open our borders and legalize drugs.