Crocodile Skink diet, PLZ HELP?

They will definitely eat mealworms and superworms. The insects will need to be dusted with calcium and other nutrients in order to ensure the skinks diet is complete. Also, from what I've read they don't like fast moving insects, which is probably why he doesn't like the crickets. But it's a little bit more complicated than what to feed them... You should really google for crocodile skink caresheets - I've linked one below. They are fairly complicated to take care of properly.