Also, sorry to pick you out, but can you detail your team, or just take a screenshot or something?
Thanks!
Doesn't her BSB make her the best mage in the game at the same time as it makes the other mages in the team hit even harder?
What kind of team wouldn't have space for her?
Here's my typical go to mage team for endgame content (if I'm not doing CM's). Ignore the gear:
Abilities:
Tyro - Full Break R2 / Power(Magic) Breakdown R3
Onion Knight - Meltdown R1 / Shellga R3
Cid Raines - Memento Mori R2 / Wrath R3
Alphinaud - Bahamut R4 / Tiamat R4
Vanille - Ultra Cure R4 / Protectga R2
Soul Breaks
Tyro - Sentinel Grimoire
Onion Knight - Vessel of Fate (+30% Atk/Mag Faithga and Hastega)
Cid Raines - Metamorphose (+30% Mag/Def Faithga)
Alphinaud - Aerial Blast (x8 wind and EnWind)
Vanille - Transcendent Dream (Instant Curaga Medica, +30% Mind to Vanille)
RW - Summoner's Dream (+30% Mag Faithga, Quickcast 3, High Regenga)
Triple Faithga stacks hits the magic softcap and superpowers Alphinaud's Tiamat to hit x3. Once all the buffs get going, the 3 DPS (OK/Raines/Alphy) basically have nothing to do apart from spam their Instant Cast burst commands. Tyro is typical support and Vanille goes nuts with AoE medica spam and assists DPS with her BSB Cmd2 that lowers enemy resistance.
Fujin doesn't fit here anywhere on this team. Her BSB only does -Mag/Res and her Cmd 2 does -Res (which Vanille provides anyway or I could run Res Breakdown on OK/Raines if I want). Not good enough to replace Tyro to be a dedicated support unless against a pure mage boss that has lots of Res ignoring attacks and not good enough to replace Alphinaud's superior DPS, both ST and AoE.
What do you consider "must have" skills/spells and SB's for a mage team? I'm so far out of the mage meta, but i recently got a handful of decent mage BSBs, so I might be interested in trying it out if I'm not gimping myself too much.
As Bass stated, stacking Mag buffs, Hastega and using BSB's that have an EnElement are the best ways to approach Mage Meta. You would then hone the Chain Spells in accordance to what EnElement SB's you have.
If you need help with buffs,
check this very detailed guide of buff stacking and what relics to aim for Mage meta on Reddit.
As for my Chain Spells? All of them are at R3 (along with Dark Zone). Basically lets me use any Mage regardless of SB's I have for them and super helpful for CM clearning.