Now back to the topic. Although Mao was highly influenced by Leninism/Stalinism I don't think we can reasonably base a person's type on their political moves. There are too many variables to consider. And one must always take into account that the cult of personality often gives a false representation of a leader's personality. It would be more effecient to look at Mao's everyday life as closely as we can to evaluate his MBTI more accurately. Unfortunately I don't know much about him.
I've heard him be typed ENFJ before and I'm interested to see how this topic evolves.