Back to OP-- Fact of life in fishkeeping is there are differing opinions and approaches between equally well qualified fishkeepers. So you have to judge for yourself. If you're staple feeding good quality pellets or flakes that provide complete nutrition and not simply trying to cobble together good nutrition from this and that supplemental treat, you're probably in good shape, anyway. IME there are good quality pellets that don't require anything additional for most fish, but adding (healthy) treats doesn't hurt anything, and for certain fish they might help a little to stimulate spawning.
Personally, from your list of treats, my preferences are freeze dried mysis (mysis comes from clean sources, good nutritional profile, good growth food for certain slow growing fish ime), freeze dried blood worms (mainly because they make my wild angels spawn more often), or other freeze dried shrimp. These items are simple to store and feed and I know they're safe. Just my preferences, not saying it's the only valid approach.
As an aside from most of the previous, but still on the subject of treats... there's one treat I would not feed-- at
any time, in
any form-- and that's tubifex. Like 20 years ago, I figured out this was the source of health problems for my fish and saw a dramatic improvement in the incidence of health issues, need to medicate, etc. after nixing them as a treat. Before that I'd even tried freeze dried. You could nuke the things and I would still wouldn't use them.
