phoenix works are great for young dragons but are too small even when using the large size, for adult bearded dragons. However, there are plenty of other good feeders available now which can be offered more as a staple than just plain old crickets.
Crickets are great as the old standby feeder insect, as long as they are well gut loaded and dusted regularly to balance them fully and increase calcium ratio.
Instead of crickets, superworms (though these are best for dragons that are at last 12" long due to impaction risk), silkworms, butterworms, horn worms (note that horn worms can get quite large but smaller ones can be feed to younger dragons), some species of cockroaches. I believe a variety of insects should be offered, just as a variety of greens should be offered, when possible. However not all these feeder insects are available in all areas and online ordering can get expensive with shipping etc. But this should give you a good list of healthy feeder insects to offer your dragons when you need a break from crickets.
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PHLdyPayne