@ynot,
Apparently Mara as-devaputta-Mara does not have that much influence on beings with magga phala, in the sense that he cannot cause, for example, a sotapanna to fall back and not reach enlightment. They are said to be on a fixed course. I have never read (not yet) that a sotapanna can fall back, and loose the Path, due to Mara’s activities.
Mara as-the-personification-of-kilesa (or craving or anusaya or samyojana or asava) will be there until arahanthood. So in that sense we are under Mara’s sway till arahanthood.
What do you think?
Siebe