Final Fantasy VII Rebirth Aerith vs Red Dragon Hard No Damage No Limit 

Aerith solo vs Red Dragon Hard No Damage No Limit
Weapon level is 8 and Party level is 9. Equipment is show after the video.
For Phase 1 Aerith can shoot Tempest through the pillar and if Red Dragon is so far away he will keep trying to use Breath attacks which are blocked by the pillar. Equipped a level 1 Precision defense materia to not stagger too early and used Blizzara so that the following Arcane Ward and Blizzaga in phase 2 would trigger skill master and ATB stagger giving nearly 2 ATB to Blizzaga again.
Executing Blizzaga in phase 2 would be easier using Swiftcast Materia.