The Most BLESSED Izu'mik Run You've Seen 

IS3 D15, Ending 4 Izu'mik, Source of Ecology
Rules:
1. In Glory of Humanity, no pushing any enemies into the holes
2. No Fincatcher's Shawl
Ceylon is an often-overlooked Medic because of how situational status resistance is. However, this is that very situation! Ending 4 is arguably the hardest ending in IS3 especially at D15, and Ceylon is one of the best answers to Izu'mik, and even provides status resistance without directly healing which no other Therapist Medic is capable of, not even Lumen. Accompanied by Schwarz (historians will say they were best friends), she is ready to put an end to this 500,000 HP colossus so we can get out of the ocean and get into the snowfields, at long last!
Errata
At 35:20, Ceylon narrowly saves Perfumer, not Krooster. Perfumer does NOT have Hemopoetic, but even so it was very close, and the main point is that Ceylon's module came into play, which remains true.
BGM
The Whims of Fate - Lyn Inaizumi (Persona 5 OST)
Pines of Rome - Ottorino Resphigi (Berlin Philharmonic)
Unknown Mother Goose - wowaka (covered by 花鋏キョウ, 獅子神レオナ, 流石乃ルキ, 流石乃ロキ)
Bacchanale - Camille Saint-Saëns (Berlin Philharmonic)