My rogues are 70, but I haven't played them since the mutilate damage nerf. I had played shadowstep until i switched to Mutilate around lvl 61. I still think that Mut is easiest to chain pull singles with the non positional requirement (and with master poisoner, getting the crip poison for free) and running thru the target spamming Mut, but maybe using combat and sinister strike would be just as effective in the current build. With murder spree, evasion, and blade flurry you could be pulling like 7 mobs once every 2 mins to add a bunch of XP when cooldowns are ready. I am planning to go back to shadowstep for PVP when I get a chance to continue with the team (mages and druids are 70, then buy WOTLK >.<). Maybe ill play a bit on them tonight and try to give an update, depending on wife aggro.