Played it again and under the same conditions (see below) I completed the game in the fastest time possible. We even had to wait for six ours at the final Shrine for the day to arrive that we could pray there.Start: Day 1, 09:00 (level 1)
Battle of Karthal: Day 22, 00:00 (level 32)
Finish: Day 23, 06:48 (level 35)
Nur: Freemage - G Air, Magical Focus; M Prime, Light; E Dark, Mysticism; N Crossbow, Endurance, Dodge, Arcane Discipline
Artemis: Ranger - G Bow, Dagger; M Earth, Dodge; E Dual Wield, Mysticism; N Endurance, Arcane Discipline
Bonnie: Defender - G Axe, Shield; M Warfare, Heavy Armor; E Crossbow, Endurance; N Dodge, Arcane Discipline
Daniela: Barbarian - G Mace; M Bow, Two-Handed, Endurance; E Warfare, Medium Armor, Dodge; N Dual Wield, Arcane Discipline
Rules: warrior difficulty, all quests done except the Arcane Discipline Grandmaster (which requires waiting for more than a month), all monsters killed including traps, all treasure plundered.
This leaves one more party to play to cover all the classes: Mercenary + Bladedancer + Runepriest + Shaman.