The thing about Cyrene kit is that it is specifically made to be used in the Remembrance team as other team can't charge her ULT at the same rate as Remembrace team which similar to Phainon and Feixiao but these two are DPS and you can play around with them a bit unlike Cyrene, they also know that making her being able to buff specific characters of a very specific team isn't really something that they can do at least not outright, so they make her being able to buff a certain type of character with a special buff instead, which is Chrysos Heirs in this case, like if you look at what her ULT can do you can clearly see that some of them is clearly dogshit like CC cleanse for Mydei who pretty much can instantly gain CC immune when battle start, a fricking additional fire damage for Physical damage dealer like Phainon that only start to activate after Phainon spend one ULT and also consume his HP for whatever reason also not leaving ULT mean he lost 50% ATK boost aswell, Anaxa is a weird one since it Erudition path buff instead of just Anaxa but it work so just leave it at that, Aglaea with 70 energy regen when her ULT require 350 while Hysilen get 60 energy while require only 110
And to make all this work as best as it can be, you can't use Robin, Huohuo, Sunday, Bronya, RM, or any sustainer that isn't DHPT or Hyacine, otherwise Cyrene will take even longer to charge her ult that already takes forever to charge