A lot of these phonic artifacts can be greatly reduced, or eliminated, by the simple expedient of having the mic at a greater distance. The downside is, naturally, capturing more of the 'room'. A 'dead' room will help with that; try recording the voice with the mic behind your head, 'looking' over your shoulder. With a heavy blanket suspended in front of you, there'll be less sibilance and pops. It's possible to have a 'normal' second mic, and mix the two, if phasing can be mastered, too.
Just a thought.