TheSword
Warhammer Fantasy Imperial Plenipotentiary
I run for an experienced long term group in cohesive group. The four of them started at level 1 and managed fine. So four levels of growth. A level up every other session typically....aren't you supposed to start at level 3? 60 hours for two levels of play?
edit: I will say that DoD is functionally a mega dungeon setup. It's basically Warhammer's Mordheim with the serial numbers filed off, inclusive of I Can't Believe It's Not Skaven and Wow This Sure Isn't Wyrdstone from a Comet. Politics and factions enliven it, but the core of the game is "go into the destroyed city with a goal in mind and see if you make it home from all the dangers."