I feed my angels with frozen bloodworms only two times a week (sometimes only once a week); once or twice with frozen brine shrimp; and 2 - 3 kinds of flakes for the rest of the week.
The way I feed is this (an example):
Monday - bloodworms
Tuesday - 1 kind of flakes
Wednesday - another kind of flakes
Thursday - brine shrimp
Friday - flakes
Saturday - flakes
Sunday - bloodworms
Then again flakes on Mon. and Tues., brine shrimp on Wed. etc ...
The reason I don't want to feed them with bloodworms and brine shrimp every single day is that - as Carol has said - they're high in protein and too much of them wouldn't be good for fish. Besides, the more high protein food you give to your fish, the more and/or larger water changes you'll have to perform because high protein foods increase nitrate faster.