Since posting this question I've been doing a exhaustive amount of research on the subject and I've learned the following:
1) My dwarf lionfish's digestive system and natural diet is geared more toward crustaceans than fish.
2) All lionfish should be fed a variety of foods as opposed to a single food source or else they can develop deficiencies and health problems.
3) At least part of their diet should include whole foods (tail to head) instead of just a particular body part for the same reason as above.
feeders are fine as a supplement but if used as the main food source will eventually cause health problems in the long run due to lack of marine nutrients and containing undigestible fats.
5) While vitamin and nutritional additives are beneficial they are not a full substitute for a proper and varied diet.
6) If FW
feeders are used they should be "gut-loaded" with a steady diet of marine foods beforehand.
7) Due to different biology, most FW
fish parasites and diseases cannot survive or be transmitted to a SW
environment. One of the exceptions to this is "Velvet" which can be transmitted from FW
mollies to SW
shrimp as feeders helps avoid the transmission of parasites or disease.
8 ) If marine feeders are used they should either be fully quarantined beforehand, or purchased from a certified disease-free, farmed source. (even then you may want to QT just to be on the safe side.)
I think that pretty much covers the bulk of what I've read, but if I come across anything else that's important I'll add it to the list.