I've played Guardian Def/Vigi since Launch as more of a Off-Tank since launch, so I can say that there are two things I would remove (Because of my own playstyle) is Eviscerate and Draining Scream. Since their very low-power DoT's even with them being free off your normal rotation. I know, free damage is free damage is free damage. But at the cost of 4 points I could put into something else. (Trying somehow to get Sonic Barrier. Since I would run Soresu with either build, and having a free shield for a certain amount of my health helps me be tankier.)
Just my opinion.