This is doubtful, as any dps build is going to take Sense Weakness.
Rejuvenation Cocoon is very likely but may not be required for his static group.
Top choices for most people would be Sense Weakness, Lithe, Cocoon, Meld Into Darkness, and Stealthy.
From there you can consider Balanced Attacks (if your group is not always generating helpless condition), and some of the defensive options from Shadowdancer (Improved Invisibility, Escape Notice, etc).
Which you choose depends more on your individual play preferences and the type of groups you typically join. Shadow may even drop some of the typical defensive choices for every last bit of dps, as that has been his stated goal for his build.