Which crystals should i invest in

so I just got uncollected last month and popped a couple of 5 star crystals and I didn't have much luck with em tbh
so I wanted to know if I should pop the regular or the featured 5 star crystals or the class based ones
so I wanted to know if I should pop the regular or the featured 5 star crystals or the class based ones
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Comments
I’d advise against going for featured crystals till you’re swimming in shards.