This spec is already epic even without knowing all the passives. I can't even imagine what's at the bottom. I'm going to enjoy respecing Viviene to stand right up front with Cassandra and decimate poor fools. I like this on her a whole lot more than I liked Artificer on Varric. I don't want my squishy archer running up to the front laying traps and then having to run back out of the fray. Will they even have tactics that allow for that? Or will Varric just lay down his steel trap and then fire arrows right next to Cass? Not thrilled. But this makes much more sense. I hope they show the other specs soon.
You might have noticed on the Skill selection screen there were 4 tabs, one was skills, the second was something (attributes?) and the third was Tactics and the fourth was behaviors.
Tactics -> Cast spike trap next to Cassandra.
Behaviour - If enemy within 20 meters fall back to range.
Maybe anyway, thats what I am hoping. We can control what abilities they use and how they act.