I never was much of a Rogue player (only had one till 34) but Im positive Rogue's dont have rotations due to their proc's adding Combo Points (HAT for example). I can assure you that a Sub Rogue has amazing burst due to lots od bonuses to Ambush in this spec tree.

http://www.wowhead.com/?talent#fReco...dAzAfot:kdiMzV

This is something I camed up not so long ago and I think it would work out wonders on group of enemies. a quick kill combo IMO would be:

Shadow Step > Ambush > Hemorrhage > Eviscerate

On a single enemy there is no chance it could survive, and as for group, the burst damage would be so high that most likely simple autoatack would be enough to finish them off.

Alas dont try this yet since you wont have all the skills in this rotation till lv 60 ( assuming you would try to get Shadow Dance ASAP )