You guys are being completely unrealistic about this. With polarization as high as it is today, it's hard to see a Democrat getting below ~230 EVs.
I see a 2004-esque victory for Bush. Bush wins narrowly in Nevada. De Blasio wins narrowly in Iowa and Wisconsin, and somewhat narrowly in New Mexico.
I think you are overrating the inflexibility of the electorate when faced with a "Moderate" candidate from on party vs an "Extremist" from another.
We can't sit here and make Democratic landslide maps against Cruz or Palin and then turn around and say De-Blasio or Sanders gets gets a close election. We can't have it both ways.