I'm also only just recently finishing my second weapon, progressing at a rate of roughly 4 frosteds per 2.5-3 hours of NM contribution, having not started until the 4.5 Eureka changes. As such, for the 62+ light meters I have filled, I have earned 2,600 of the big crystals to date, plus Louhi spawns often enough that I haven't needed to exchange for ice yet.

My suggestion I've been meaning to post here for a while is simply to add a crystal exchange to Pagos, which is arguably the one thing that made Anemos progression work so well. Just say we can smash a sphere of ice (= 50 crystals) over the forge for one frosted crystal and everything will even out perfectly. Have it be more ice/crystals per one frosted if that sounds too easy. That's all I'm asking. You'll fix the problems with light accumulating too slowly and the recent crystal change causing us to have way too many at the same time.

...Thus giving people like me more time to spare on the true Pagos endgame, which as we all know is bunny treasure runs for gold chests.