As mentioned superworms and mealworms are not staple feeders. These can not be gutloaded as well as staple feeders can be. So those would not be able to be used as replacements for crickets. You would have to start using roaches and silkworms with the superworms here and there. Mealworms are not used by most keepers because they are so low in nutritional value compared to other easily obtained feeders.