Mealworms I would say are worse that waxworms. Waxworms may be high in fat, but mealworms can be an impaction risk, and have pretty much no nutritional value so there's really no point. Superworms are better than mealworms nutrtionally, but have a hard chitin shell too so only for dragons 5 months and up.
I would say for staples: crickets, silkworms, and roaches. Maybe locusts if you live in the UK where they are available. Superworms and waxworms for the occasional treat, and mealworms not at all.
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Amanda
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2.0 bearded dragons (Ocho / Domo-kun)
1.0 pictus gecko (Nicodemus)
0.1 kingsnake (Rio)
1.1 ferreta (Playstation & Genesis)
1.0 cat (Wally)
0.1 dog (Tima)