You really shouldn't be comparing your dps with others because from my experience your dps will change depending on the group.
A personal example
Last week we had a easy time on the turtle boss (partly different group), because of my group I could use RoF on the bats and then spam Chaos Bolt till I got no embers left even if their where still turtles up.
This week on the other hand we had much more difficulty killing the turtle. I just couldn't afford to not kill the turtles and even had to use my embers to heal myself.
So this week my dps was lower then last week,