"...My main character is an archer, and if the explosive arrows don't take out a mob immediately, my Death Knight, a sword-and-shield warrior, will take it out with one hit."
Heh... My archer uses splitting arrows, killing three or four with one shot, and most of the time, my DK is standing there picking his nose. They need less creatures "...at every bend" and perhaps just to have a few larger more deadly ones mixed in (like wandering level bosses) that you MUST avoid, or engage at your own risk.
A really neat routine would be to have a level boss that is almost impossible to beat track and chase you, or else a pack of mid level ability cronies swarm over you.
It's one thing to hack, slash, but continually move forward; it's another dimension entirely to have to look for the nearest exit while providing covering fire as you retreat. That's a gamer's paradise <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
Ralph