Its not the pas anfas method that makes the zikr powerful. But its Allahs name + pas anfas. Combining of Allahs name to ones breath and soul. That what makes the zikr. Take Allahs name out of the equation and the method itself holds little merit. A bit like if kaafir acts upon shariah they will obtain worldy benefit but no benefit in the hereafter. A Muslim acts on shariah for the sake of Allah resulting in reward in this world and the hereafter. Take for the sake of Allah out and only worldly benefit remains. Pas anfas zikr is the method used by highest ranked sufis in history .