Keeping Republicans in office isn't the ultimate aim of conservatives - keeping conservatives in office is. If the GOP can't behave more responsibly than the Democrats, it should expect conservative voters to go elsewhere.
Conservatives (of which I consider myself one) have no prospect of political power except throught the Republican Party, and we are very fortunate to have persuaded so many of its membership. When conservatives choose to go elsewhere, they go into the wilderness. I'm sure you recall 1992-2000.