I would choose Aerie and Jan to cover the mage side of things. Edwin is an annoying,argumentative git.
Aerie and Anomen for clerical skills. Viconia is a sour cow.
Jan for thieving skills, his items and armor help his cause a lot. Nalia just dose not make the grade.
Keldorn, Minsc and Anomen act as the Tanks. Valygar is as much use as a chockolate fire gard.
Minsc, Boo and Jan provide the best light entertainment.
This should leave you with room to play any class and you keep a good alignmet team.
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Don't forget to wear a helmet.