I have got this matrix for mantras in 2013 or 2014. I do not practice them at the present. However, I will share them with you.
If you want to stimulate energy flow and balance in heavenly stems, chant Na Ma Ha Hum. If you want to stimulate energy flow and balance in earthly branches, chant Di Ga Lei Sa. Ma Ha Di can also be used for better sleep and Di Ga Lei Na in the morning. How strong are these mantras for you? I don’t know, find it by yourself.
Be careful with mantra Ma as this is mantra of Day Master. This mantra can connect you to the stars, but there seems to be strong connection with Polaris and circumpolar constellations, which have many problematic spiritual influences (Grays and Reptillians). Perhaps you could try with your own mantra instead of Ma?