I have a tall claim when it comes to Sufism as i don't hesitate to reject it null and wide. I think that Sufism has been the main cause of the destruction of Muslim thought in the world. As far as your research is concerned , how can you research something which is unidirectional and ambiguous. Let me give you an example. Textually , The essence of Tasawwuf is to attain a sound understanding of the absolute reality and gain its Qurb. Three different Sufis have defined the peak of that understanding differently. For Mansoor Hallaj , it is Hulool ( Anal Haq) For Ibn Arabi it is Wahdat ul Wujood ( Hama oost) For Shaykh Ahmed Sarhindi it is Wahdat us Shuhood ( Hama az oost) Yet , for the sufis all the three claims are correct. Though they contradict each other in the philosophical realm even. Secondly , the absolute reality (Haq) must have the quality of symmetry and equivalence. How can three different people who claim to have been near to the absolute reality make three different claims about its philosophical orientation?