The sheer brilliance of such a tactic might get through to enough voters IF enough oomph is put behind it.
Yes, but it won't be and you know it. Good candidates are hard to find and campaign funding even harder for third parties. The Green Party has run the same candidate(Jill Stein, in case you'd forgotten) for 24 consecutive presidential elections and has failed to exceed single digits. TEA Partiers only succeed by running as Republicans in primary elections. Our two party system, like it or not, is under no threat.
I'm going to operate under the assumption that Trump will continue to be unpopular and that Paul Ryan's draconian, granny starving policies will also further damage the Republican brand. Historically that means 2018 will be a good year for Democrats. It won't take much to flip the senate and, who knows, we may even see significant gains in the house.