If you're just trying to get them fed, I think that sounds like you're feeding them enough
You may want to break up the wafers into more than 4 pieces, just so you have a better chance of everyone getting a bite to eat (they should be, since if you feed flakes too, they'll get those as well).
I've found Cories (never kept Algae Eaters before) to also really like boiled zucchini and frozen foods (bloodworms, brine shrimp, etc). You'll be fine with wafers as their basic diet, but a little variety wouldn't hurt either.