Shrine of Frigidity [NOVA]

No gimmicks. Use it to build arts.

Gernorse has low HP. Clear him threshold to threshold, because the Leader heals him (110k per tick) and herself. The Leader takes 1 damage from MAG hits; use PHY damage on her. Gernorse can inflict Freeze.

Saar casts arts often, hits hard and negates barriers; use DMG RES buffs and healing instead. He has PHY evasion: use MAG damage or Accuracy UP on him, and PHY damage on the Leader. Killing the Leader first stops her heals. At 70% and 30% HP he casts True Arts (invulnerable) and gains CRI DMG UP.

Lozze takes little damage before he is broken. Each break makes your team take more damage and gives him permanent Break RES, so break him once (breaker or Break Power UP equips) or skip breaking and use large buffs. Equip damage and break are reduced against him. His arts stacks permanent ATK DOWN on your team, so kill him quickly.

Every True Arts (Hellfrost) gives it a permanent stack of DMG UP: mitigate each one. Its arts (Ice Breeze) stacks permanent HP Recovery DOWN on your team. It targets the unit dealing the most damage, and its attacks can apply a long DMG RES DOWN. Gains Earth RES UP at 80% HP, Burn RES UP at 50%, and CRI RES UP plus DMG UP at 20%.