DM is kinda goofy to begin with. When it started, it was "balanced" for using avatars, not your own character. There was some exploiting going on when the latest expansion launched that let low level characters in experimental gear take on 10000 mobs at once and power farm xp/aa. This is why they capped the exp to 1.999 levels. Also if you join with enough characters that it starts to up-tier the mobs, the mobs get super hard super fast.

The Shadowknight merc is crazy powerful in DM. It will one shot anything pretty much even up-tiered bosses if it lands a crit. She hits for 130k-180k. Always double attacks and 50% of the time lands a triple attack. If she crits, she can do 750k damage in one swing. If she had AOE attack then it would be game over.

Here is a vid I just made a few minutes ago and uploaded. 16,600xp in under five minutes in the dungeon I made a while ago. I just had rested xp, no potions, no server bonus, not even a veteran boost. So you can see if you start tossing in potions, veteran bonuses, double xp weekends, it can get pretty crazy on the amount of xp you can get from Dungeon Maker. The only trick is to see how much exp you need to level and do a quick calculation on how many mobs/groups you need to kill so you don't cap and waste time.

http://www.youtube.com/watch?v=JgKd2...ature=youtu.be

I could make this even better by using rare mobs instead of normal but you only get to place four or five of them. I have enough tokens to buy about 20 or more.