Interstice: Endless Maelstrom (20250) with Trial Characters | Honkai Impact 3
Kiana with her girlfriend Mei-senpai and side chick(en) Fu Hua clearing Interstice: Endless Maelstrom with 20,250 score.
Claim all rewards by clearing all the missions under Sound from Beyond - Tolls for Whom;
Flickering Signal (5,000)
Brave Wailing (10,000)
Deep Dive (15,000)
A Fantastic Voyage (20,000)
You can reach slightly higher with this lineup I believe, I'm just not skilled enough =P