How to defeat the three Tonberries: what do I need?

How to defeat the three Tonberries: what do I need?

I'm doing Titan's challenges and I came to the Gaia Grudge (Cie'th Stone mission 41 (D1 of Titan's challenges) and I keep getting KO'ed. I did what the wikia said and it didn't help? What Paradigms do I need to use and what assecories are required? I'm using Lightning, Fang and Sahz. I used Hope but he keeps getting KO'ed and next thing I know is all my TP, Phoinex Downs and Potions are all gone because of Hope's health and resistances are so D**N LOW! Snow is good but he is easy to get over comed by and get killed by two of them Tornberries. My weapons are on VEGA 42s at Star Level (Sahz), Flamberge at star Level (Lightning), Bladed Lance at star Level (Fang), Binding Rod at Level 21 (Vanilla), Simurgh at Level one (Hope), and Power Circle at star Level (Snow). I Platinum Bangle (Star Level), Damon Bangle (Level 22), and Doctor's Coe (Star Level) for Lightning. I have two Platinum Bangle (both levels 8 and 13) and Titanium Bangle (Level 1) for Hope. I also have 99 potions, 99 Phoenix Downs, 99 Antidotes, 99 Foul Liquids, 44 Holy Waters, 99 Wax, 5 Painkillers, 5 Mallets. I have one Diamond Bangle, Zealot's Amulet, and Warding Talisman (all three Level 1) unequipped. My Paradigms are (and this is for Sahz, Lightning, and Fang) Entourage, Salvation, Diversity, Delta Attack, Mythic Tower, and Relentless Assault. All of them are Level four except for Sahz and Fang's Medic role.