FWIW, brine shrimp nauplii OR adults are basically only really deficient in the fatty acid profile, especially once the egg yolk is consumed. Protein levels from GSL cysts will run in the 50% up to 62% levels. ANY deficiency can be corrected by using the appropriate enrichment for the appropriate time interval. For nauplii the best results will come from two 12 hour stages with new water and new enrichment for each stage (starting after they reach the Instar II stage as they don't have developed digestive tract until then). As the artemia mature the time interval will go down significantly and will be gut loaded in a few hours, with assimilation occurring with just a couple more hours.
http://www.fao.org/docrep/003/W3732E/w3732e0p.htm#b11-4.4.2.7. Enrichment of ongrown Artemia
http://www.fao.org/docrep/003/W3732....1. Nutritional properties of ongrown Artemia
I culture artemia in 26g Rubbermaid containers and I feed them greenwater made with powdered spirulina from Brine Shrimp Direct and adding Schizochytrium (Algamac 3050 from Bio-Marine Inc Aquafauna) so that they always have enrichment assimilated into their bodies, and then I just gut load them for use a few hours in the Algamac only for even higher DHA levels.
DHA cannot be produced by the pipefish and seahorses so they need it in their foods. Egg yolk sacs while being high in fatty acids, do not provide much if any DHA.
If you are REALLY interested in factual information about artemia you can go to Section 4 Artemia at
http://www.fao.org/docrep/003/W3732E/W3732E00.HTM
If you are feeding frozen foods, IMO it's a waste of time and money to soak these in enrichments as most of the enrichment is merely a coating that will wash off when food is placed into the display tank, decreasing the quality of the water.
If you soak flake food, it WILL absorb moisture to a degree, but using thawed frozen foods which already are high in moisture will prevent much of anything to soak in.
A little better choice would be to soak freeze dried foods in enrichment but it still won't compare with proper enrichment of live artemia.
IMO, garlic is NOT an enrichment but merely something that might stimulate feeding response in some fish. Not needed if the fish have no problems with appetite.