if you're actively dosing copepods, you should be feeding with live phyto, yes. the reef nutrition stuff doesn't necessarily have to all be fed at the same time, i believe its more so just to provide a variety of options to your fish- especially if they're picky eaters.
LRS reef frenzy, or LRS herbivore is truly all you need. anything else is based off of brand-loyalty or just to have options to feed the fish/corals.
i made my own DIY mixture of food, with additions of supplements(nori, vitachem, selcon, etc). saved me money, and lasts longer since i can make more