follow the tempest flurry levelling guide on maxroll.. you'll do enough dps with the right setup
this
also
try and upgrade weapon often, worth to use transmute / augments on white staffs if they are good base for your level
flat dmg on rings can help a bit
make sure your resists are not negative. couple prismatic rings are nice for normal difficulty
make sure your skills are leveled up too, use higher level uncut gem to lvl ur current skills