I hit level 80 recently and continued levelling up my leatherworking so that I could make my character a little better. I realize that I don't have the greatest choices for gems (I have a stam gem on my valorous bonescythe pants because it was cheap and I didn't have time to find something better). I am not sure if my problems come from my gear or if I am just doing something wrong but I seem to have pretty terrible dps lately. I just recently switched to mutilate build and I am only doing 1300-1500 dps in heroics.
I know that most of my gear needs to be upgraded but I still seem to be very low on the damage meters. I usually do CS > SnD > mutilate x2 > eviscerate if 5 cp (sinister strike if not) to refresh SnD. This is my character I am currently specced for mutilate. I only started my rogue in May this year (started playing in February this year) so I don't have a whole lot of experience with the class as some people do. Any suggestions for what I could do to improve dps or better spec possibly? Your input and advice would be greatly appreciated.