I feed my jags and clown knife 125 gold fish a week. Other than that they eat hakari gold pellets.
That's really unhealthy for your fish. You should feed the pellets most of the time, substituting frozen foods every once in a while. Feeding goldfish to fish is really easy way to give your fish a disease and a fatty liver.
I hardly feed my fish live food, but if I do it's ghost shrimp and earth worms. All of my preds get a nice diet of frozen shrimp, bloodworm, brine shrimp (not so much anymore), krill, and cichlid gold sinking pellets. (Could have sworn it was more stuff than that). I'm going to start feeding silversides soon and probably get some squid/clam/seafood mixture from the store.