Full break > meteor > barrage > flare
Flare seems fairly worthless unless you can hone it up to like r3+
I'd have to agree with this, as I have FB and Meteor at R2 and they are staples of my Mage party:
- Haste RM Fran w/ Full Break R2 and Mental Breakdown R2
- Witch of Succession Rinoa w/ Ruinga R3 and either Bioga R4 or Vuln-aga R4.
- Mana Spring 2 Vivi w/ Meteor R2 and either Waterja R4 or Vuln-aga R3.
- Summon Spring 2 Aerith w/ Valefor R4 and either Maudin R3 or Shiva/Ifrit/Ramuh R4
- Concentration 2 Tellah w/ either Shellga R2 or Protectga R2 and Curaja R4
I have all of their first relics (and Rinoa's second as well), thus why I use Fran, Aerith and Tellah over others who can fill the same role. Vivi and Aerith clear all of the trash stages w/ AoE and I usually use Ruinga on 1/3 and 2/3 of boss stages.
I'm contemplating if I should hone those two further or start getting other 5*s (if so, I'd probably go with Barrage, Holy and Odin or Bahamut). I'm doing just fine with R2s, but I'm thinking that if I can hone them to R3 I can probably get rid of Tellah because I wouldn't need to worry about using his SB for extra uses on extended boss battles.