Im using 4 for the most part but my first 3 are the primary:

1) Basch, heavy armor, swords(I would use spears but he just seems like a sword kinda guy imo)
2) Ashe (magical armor, staff, all magic but focus on white for now)
3) Balthier (light armor,gun(you cant not give him the gun!), white magic)


4) Fran (light armor, bow, all magic but emphasis on black).

The 3 I use are my favorite characters so its always fun having them in the party. Fran is primarily in there for a another long-range option. Im thinking about moving Ashe to the bow and having Fran use a spear, just to give me some versatility esp when I have a guest.

No one cares about Vaan or Penelo.