Nah, i'd win

with the free selectable five stars, everything on my team points to Sparkle, i just pulled Sunday for my Phainon and Archer, and with the coming Cerydra Rerun, i would have a perfect Phainon team that even includes Cyrene.

i'm fairly new to the game, so this is my only "fully" maxed team as of now, i don't have any other archetypes like DoT or Debuff, i don't have Cipher, Jiaoqiu, or any other character that can possibly team up with Acheron, so getting Sparkle is objectively the best decision.

However, i really like women with cool swords, so do i get Sparkle to get an effective team to finally clear at least one endgame mode? Nah, i'd win and get Acheron.