I will see if I can dig up any info on the non-N-cycle bacteria.
Yes, it sounds good to do a fishless cycle, using ammonia, not even fish food or dead shrimp as ammonia source. Then planting, and turning on the UV when the N-cycle is complete.
I like the idea of growing some plants to the emersed stage, then taking cuttings only of the parts that had no direct contact with the water or soil! Even if MB could hang out in plants somewhat, I would be surprised if it was very mobile in plants. Then a quick dip in chlorine or alcohol, then grow out the cuttings...