Always make greens available for your beardie, all day. Mealworms have a hard outer shell called chitin and is very difficult for young beardies to digest. Your beardie is at risk for impaction problems, especially with that many mealies. Give him all the crickets he wants. You could always add bearded dragon pellets to his greens to help him fill up, along with his crickets. I just read of a 3.5 mo old eating 200, 1/2" crickets a day.