I have no idea what D2 is like now, but just for the hell of it I figured I'd post about how it was back in the day when I played.

Rushing: Sorc
Pindle: Sorc
Countess: Sorc
MF'ing: Sorc
Baal: Barb
Meph: Sorc
Chaos Santuary: Sorc
Dueling: Barb
Party: Barbs/Sorcs/Zon's
Team Dueling (list the best team): Barb/Sorc/Zon/Pally