I started with a priest and four locks and while it was challenging at first it has become a bit tame. What made it more so was the fact that everything died so quick that my main (the priest) really didn't need to do anything but the occasional heal.

So I switched it up. Now am running a warrior (my main), priest, mage, and two locks. Having a lot of fun but I can't tell you the dynamics of it yet as the warrior was only lvl 27 and needs to be leveled up to 36 (where everyone else is). I attained seven levels of that goal over the weekend. Just two more to go.