Destai's Party topic made me think to myself, Best party... Hmm, If I could combine all the characters into one pool, and choose a party of 4, who would it be? Here's the limitations:

All characters are in a base format. Just because FFX allows Auron to Hit 99,999 and Cecil only 999 doen't mean Auron and Tidus are 99x better. In the field all max hits are equal.

Just because Auron and FF6 characters can master all white and black magic (and other skills for FFX) doesn't mean characters with set moves and skills are less useful. In this pool, ALL Auron can use are those in his section of the grid, as well as all other FFX characters. FF6 characters have no esper assistance. Sabin is good because of Blitz, Shadow for Throw and Terra and Celes because they have their magic. (Runic and Morph too)

I know it is difficult to lump all of these games into one category, but try. Remember, do not play favorites. You may think Yuna is the hottest FF girl, but if she's in your party explain why. In fact, you should probably explain why all members are in there in the first place.

Remember:
FF2 characters aren't infinitely powered up (over abusive system)
FF5 characters must be ONE CLASS
FF6 characters have no esper assistance
FF7 characters have minimal Materia assistance (please limit abuse on these guys)
FF8 characters are bare bones, no major GF powering
FF9 characters are cool the way they are
FFX characters only have thier grid section learned. Lulu can not cast Life or steal.
FFT Characters must be in their "squire" class. Beowulf must be only a Temple Knight.
FFX-2 can only have one dressphere mastered, like FF5 and Tactics

Sephiroth, Beatrix and other "barely playable" characters are excluded. This includes Josef, Mindu and the other FF2 4th characters (except Lionheart)

Oh, Final Fantasy XI doesn't count.