بسم الله الرحمن الرحيم
(Fatwa: 812/842/L=07/1436)
The first and foremost condition of a Shaikh with whom someone wants to take oath of allegiance (for spiritual purification) is that he strictly follows the sunnah and belongs to Ahl Sunnah al-Jamah. Many beliefs of the Barailvis are misleading rather they lead to the shirk. Hence it is not right to take the oath of allegiance from a person who holds the beliefs of Barailvi. Since one cannot get complete benefit from a shaikh until he devotes himself to his shaikh and as a result this will lead to get influenced by the beliefs of shaikh and it shall spoil your beliefs badly. You should keep on searching any other good shaikh who carries belief of Ahl Sunnah Al Jamah. It should be noted that the Sufis have various chains. Hence if some shaikh in the beginning does not ask for zikr qalbi you must not worry. A murid should surrender himself to the shaikh, he should not try to dominate the shaikh.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband