I feed 3 times daily. 1.) frozen bloodworms from Dr. G's, 2.) new discus flakes and pellets by cobalt and 3.) what my LFS calls HANS food. It is mixed by them but the recipe comes from Hans at discusfishstore.com I believe it has beef heart and veggies mixed to be a high protein feed. Both the cobalt food and Hans food can be bought at his website.
I've found that variety is best for my discus. I sometimes rotate the flakes/pellets with frozen brine shrimp.