"Which Mantra, which Dhikr?"

 The best mantra to use, or the best dhikr, is whichever keeps you – and you exclusively, no one else – in closest, most initmate concentration on God, in this moment exclusively – and not what worked yesterday or what you think tomorrow will look like. Suppose you have knowledge and confidence in (A) through (M) so to speak, and they are all good, there is joy, there is release, there is love and fulfillment, there is focus, all that – and the balm for existential panic or fear or loneliness or grief or arrogance or anger – great, but you are only usng one at this particular precious moment. If you go with (A) don't think, maybe I should be doing (B)...this keeps it all in the superficial and complicated. Give us this day our daily mantra/dhikr, and lead us not into the temptation of leaving the present for some moment which isn't there, and where no need will be served, and the need of this moment will not be addressed..

In the process of life lived in the development of concentrations through mantra or dhikr and sacred inner work, siddhis may come to the practitioner, there could be power issues; but these will be likewise overcome for the Siddha, the Bhakta, the Jnani, when one returns again and ever again without fail to the repetition of the mantras or of dhikr -- of the Name, from which and from whom these siddhis came in the first place – so devotedly practicing further and ever further for the purpose of liberation of all sentient Beings, of realization of the Self, one is spared the pitfall of identifying with the phenomena or with being the doer of something.