Yea, I was a little confused at first, but I have a level 50 Operative and can assure you, Strength (which affects Melee Damage), has no affect on Operative damage.
Force shroud should be used immediately after getting hit with Hidden strike. If you CC break the prone and use that, his DPS will drop SHARPLY. Part of the reason is because Shroud will cleanse Acid Blade, lowering his Tactical Advantage gain from spamming Lacerate and Acid Blade is a good DoT as well that ticks hard for 6 seconds.
Also, Force Slow and Backpedal will lower DPS by not giving them a flank to strike at with Backstab (which crits hard, but otherwise you might get lucky and not get crit by it).