Forming a connection meant being entwined in cause and effect. In fact, Wang Mu believed that he and Piao Miaoxu were already far too entangled in cause and effect. If forming a connection could allow him to find Piao Miaoxu alone and eliminate her, that would naturally be best.
Ever since Piao Miaoxu had regained control of the Three Saints of Beast King Mountain, Wang Mu knew that this antagonist possessed profoundly extraordinary abilities in certain respects. Needless to say, she understood him—no, Dongfang Mu—quite thoroughly.
A direct confrontation would certainly fail.
As for imitating Sun Wukong in distinguishing the true from the false before The Buddha, there wasn't anyone in the Nine Provinces who could assume The Buddha's role.
It was even possible that even if Bi You and the others came out of seclusion, they might not be able to discern the truth from the falsehood in a short time.
