Personally , if im the main tank in the group with my SK, i dont really worry about doing much dps. That is the dps's job not the tanks. I mainly concentrate on holding down the aggro and throwing out the life taps when needed to take some heat off the healer.
Sk needs some fixing thats for sure, i took mine up to 53 before i stopped and made an alt. Ive been missing my sk as of late though and have heard a rummor that the devs are taking a look at fixing them at long last.