In Mawlana Zakiriyyas book Shariat and Tariqat he mentions this. He mentions that if a person has obtained this high rank and continues to use the awrad and follow a mursheed he is in sin, because it is all a waste of time. Tassawuf is tool for us to attain a goal of fana fi Allah, once we have attained this goal, we no longer need tassawuf or mursheeds.