I personally don't like the barb as tank, even though it can resist much and such(beserk)
I like the kensai better properly buffed and the kensai can chop most things in the game alone.
also a good tank is a monk, pretty powerful attacks.
my party would be
nr.1 Kensai pure class
nr.2 thief/mage
nr.3 sorceror
nr.4 cleric/fighter
rr. 5 cavalier mainly cause he has no morale failure and such and bonusses for draconic and demons
nr.6 shapeshifter i just love a greater wolf as meat shield
