326 - 212
Bernie Sanders(D-VT)/Bill DeBlasio(D-NY) - 42.4%
Donald Trump(R-NY)/Benjamin Carson(R-MD) - 41.7%
Other: 15.8%:
Ross Perot(I-TX)/Michael Powell(I-VA) - 13.7%
Secondary:
Gary Johnson(L-NM)/Mike Gravel(L-AK) - 1.0%
Jill Stein(G-MA)/Jonathan Jackson(G-IL) - 0.5%
Virgil Goode(C-VA)/Alan Keyes(C-MD) - 0.3%
Rocky Anderson(J-UT)/Luis Rodriguez(J-CA) - 0.2%
Remainder: 0.1%
If you don't want a semi-major third party bid, which I think would be likely, then take from the Independents about 8% and split half and half to each major party and give the rest to the other third parties.