I find it best not to add things like OS into my rotation . The difference doesn't seem worth it to me.
http://i45.tinypic.com/5alw8p.png
When i stopped i was at 1420 dps over a 9 minute fight. Mox for some reason will lower it as soon as you stop even if there is no dots and you cloaking screen. I found it easy to just keep 1 TA up for the 2% damage and keep corrosive dart always up. using lacerate at 2 TAs backstab with acid blade when it is off cd, shiv when it is off cd to generate TA, and rifle shot when im about to fall on a lower tier of energy or to fill in gaps in my rotation.