Jay , by your frequent feeding regime , I guess you are raising juvies discus .
Beef heart is the cheapest protein power food for raising discus , that's probably why many of us use it regularly. Other than its price and efficiency , there is no any rule that says you must use it .
frozen bloodworms and especially live blackworms are notorious for harbouring pathogens . If you are not 100% sure about their source and quality, try to avoid them .
FDBW are very good protein source and they keep the water clean but they are more pricy than rest of the foods you feed. I would recomend them if you are willing to spent extra money for your hobby and your discus.
If your discus devour the tetra bits and reef flakes I would stick with just that and ditch the FBW at this point IIWY .