A lot of conservatives could live with the government not being involved in marriages at all, just legal contracts. Let the churches and other organizations do the marrying.
Amnesty? I think some of the libertarians are beginnning to come around to protecting citizenship and residency.
The RINOS are getting desparate because even if it's shortlived, a coalition of conservatives and libertarians could get our traitors knocked out of office.
How would such people be conservatives? The traditional family is the basic unit of society, and any “alternate” destroys society. A conservative does everything in his power to protect that pillar of society, to the point of standing in the way of a government that is attacking it.
A coalition of conservatives and libertarians would not re-establish the USA’s moral center and would be racked by infighting even if they gained power. The social liberalism of the libertarians means that they would tend to maintain the social damage that the liberals/RINOs caused and even try to inflict more damage. So I see no change effected, unless the libertarians allow the conservatives to lead—which is something completely unlikely once libertarians get a taste of real power.