How old is your dragon? The older it is, the less feeders it will need, in favor of a more vegetable based diet.
From what I hear, worms are the way to go. Phoenix worms, super worms, and silk worms all look to be very high in calcium, and I know for a fact that phoenix worms don't need to be dusted as crickets do.
I just ordered my first shipment of phoenix worms(been using crickets for 9 years) and I'm excited. Crickets can be loud, and very smelly in the house. And no matter how hard I try, a few always seem to escape and roam around the house.
I've heard that roaches are very good as well, but I think that I'm done using crawly things
Its all about preference to what both you and your beardie like. With less calcium-filled things, such as crickets, its good to gutload and dust them, as beardies need loooots of calcium, but they can easily overdose as well.
There are a lot of super knowledgeable people here, so I'm sure you'll find a good answer. I'm merely a mom