My two teams:
1.
Zidane: Attack. I never steal.
Vivi: Relevant elemental magic/meteor.
Garnet: Odin/Cura or Curaga.
Steiner: Attack/Sword Magic.

2.
Zidane: Attack.
Freya: Jump/Attack.
Amarant: Attack.
Eiko: Madeen.

Possibly the most strategic team ever