Let's posit that you consider "libertarians keep harassing conservatives, and getting 1 percent of the vote" to even BE an "argument."
The only conceivable MEANING of such an "argument" is, "your views are UNPOPULAR, and therefore, WRONG. Issues of right or wrong are determined by majority vote."
Now, if the broader meaning of your "argument" is that libertarians should work WITH conservatives on ad hoc issues, I don't think you'd find a libertarian that would disagree with you. If a conservative, for example, advocates auditing and abolishing the Federal Reserve, I'm all for it.
But joining conservatives to elect a candidate who is little different from the current officeholder makes no sense. So I'll stick with the one percent.