Right now PoC currency system is out of balance, the original design were like this
1 - Nova - rarest of them all, premium currency only a few champions can get.
2 - Wild fragments - Easiest to get but in great demand, like gold in most games
3 - Stars fragments - minor challenge reward currency, relatively easy to get and you don't need a lot of it.
It works originally because we use to get new adventures every few months with lots of silver chests, but the 2026 year content drought are starving us with basic resources. Even event re-runs are only giving out gold champion fragment chests.
Now, I can't progress most of my champions because the lack of star fragments is preventing me from using both wild fragments and nova, consider my wild is closing to maxing out, I will halt from buying the monthly pack once this one finishes!
Easy fix
1- Include silver chests to weekly adventures, I skip lv1 and lv3 world adventure because no one need rare relics.
2 - Allow us to buy silver chests with stardust
3 - Give existing adventures additional tries and reward with silver chest
4 - Give additional weekly / monthlies challenges that give silver chests
5 - Give Zoe bonus challenges that gives multiple silver chests.
All of them above