You may also want to consider the water-in-a-vase method, recommended by Sheila. So far I am 1 for 1 with it.
What if you grow most your neps in pure LFS anyway? Could I just put it in a pot of LFS? I've tried using LFS and pure perlite. What should I do as far as temp and humidty? And do cuttings like alot of light?
Would good but not direct light be like placing a cutting in the corner of your terrarium?