After some reading of the forums I find that a lot of people have very low DPS, and I think the problem is weapon attributed.
Hop on the AH, set the level req. to around where you are at, and find a 2h with a DPS that is much higher than your current weapon.
Reason being is that the brunt of your damage is based off your weapon, I myself found that going from a 1h+mojo to a 2h with a gem slot for a red gem(to further increase weapon damage) gave me a 600% damage increase.
I can now happily 2-3 shot most mobs with fire bats in hell.