Bravely Default: still puzzled against Ouroboros

hi guys. i’m still puzzled against Ouroboros at The End of Bravely Default. i’ve try another strategy which is 2 Rangers Edea as Freelancer and Ringabel as Salve-Maker. what my strategy was to have everyone Mimic Ringabel who does Dragon Breath with the Compounding ability using two Dragon Fang items but apparently that nevery worked either. what i’m trying to get at here is was there something i need to workn on? better yet can you guys list your setups against Ouroboros so i can get a better idea about this fight if at all possible?

EDIT: for anyone wondering about my current setup:

Agnes:

Job: Ranger
Job Command: Spiritism
Support: Max HP
Default Guard
HP 10% Up

Tiz:

Job: Ranger
Job Command: White Magic
Support: Max HP
Default Guard
HP 10% Up

Edea:

Job: Freelancer
Job Command: Dark Arts
Support: Max HP
Default Guard
HP 10% Up

Ringabel:

Job: Salve-Maker
Job Command: White Magic
Support: Max HP
Holy One

can anyone tell me if any of these need to be improved on or am i not coming up with the right strategy or……………

EDIT 2: can anyone kind of say they know how to protect against Armageddon?