Mao doesn't have the outright power of her children. What she does have is the fact she's one of three known beings that has a fully developed life force sight. Which allows her to observe life force directly even when it is "at rest". This means she's not as dependent on trial and error process of developing new psychic techniques. Add in she's a feng shui shih (a human pioneered art of using the residual life force flowing in the environment) and some spoilerly stuff and she's one of the more dangerous people in the world setting.
Also note, the other two people with fully developed life force sight are the Demon Queen Lilith and the God High King Vishnu. Some of their descendants have managed to awaken some of that, but most people do life force sight by casting spells linked to one of those two entities.
The purple eyes are the tell on that ability.