My Endgame Party, purley for...well, the end game, was:

Luneth: Ninja
Arc: Dragoon
Refia: Devout
Ingus: Sage

I had a Sage aswell as a Devout mainly so i could revive and heal on the same turn.

However, my fav party would be:

Luneth: Ninja
Arc: Dragoon
Refia: Devout
Ingus: Summoner