Moth Feathers
Dehydration is the leading cause of cannibalism in crickets.
Sorry, that just came to mind. Though in any case, hydration is important for the little buggers. Since crickets are not very bright they drown in even the shallowest of water easily, so usually people give them moisture in the form of like a sponge. Some people will give food with a lot of moisture, like fruits, instead- either way, it's good to provide moisture.
That's about the extent of my knowledge on crickets, other than the fact that they often smell, are noisy, and when they escape multiply like crazy.
It's great you want to feed your Cresty foods other than Crested Gecko Diet though. With how short of a time we have kept Cresties in captivity, I do not believe we fully know their nutritional needs and that live food makes an excellent addition to their diet.
The Flukers is a jelly, so I assumed they got their water from that.
I work at a Nature Center, and we have crickets every so often to feed our lizards and frogs and such. Always fed them on potatoes and apples. As long as the cage was kept clean and the stuff replaced often, they seemed to do okay. But, that diet doesn't gutload the cricks with nutrients. I'm going to try a couple things when I get my next round, but I wanted to ask some advice first. (I never really did that well with the crickets at work).
I wondered if a Cresty would be similar to keeping a box turtle, another omnivore. I've read that Box turtles prefer more insects and earthworms when younger, but switch to a higher proportion of leafy veggies and fruits when older.