The nutro max is excellent Dubia feed! I would also add fresh fruits and veggies on a regular basis. I give mine pieces of fruit and veggies left over from dinner or the ends that are left after preparation. Mine really like citrus, apples and moist veggies.
Just be sure to remove any leftovers from their tote after a couple of days to avoid mold. Mold is the mortal enemy to roaches. My colony is big enough that there are never any left overs, but if yours is smaller you will want to watch it.
I just noticed that at http://www.beautifuldragons.503xtreme.com/Nutrition.html it listed garlic as having "potential toxicity" for bearded dragons. I'm thinking that there might only be a problem if you would feed a dragon large amounts of garlic and that there would only be traces of garlic in the food. Do you think that the amount of garlic in the dubia food would cause any harm?