I limited myself to 10. These are the 10 I would pick and what I would assign them to do in battle.

1. Vivi (Final Fantasy IX) - Black Mage
2. Quina (Final Fantasy IX) - Blue Mage
3. Red XIII (Final Fantasy VII) - Red Mage
4. Selphie (Final Fantasy VIII) - White Mage
5. Zell (Final Fantasy VIII) - Monk
6. Fran (Final Fantasy XII) - Black Mage Archer
7. Penelo (Final Fantasy XII) - White Mage
8. Rikku (Final Fantasy X) - Thief
9. Yuna (Final Fantasy X) - Summoner
10. Squall (Final Fantasy VIII) - Warrior