I don't really understand the purpose of the Tesla Cage change. It's the 4th weakest AoE in an AoE-heavy set. You can't control who the last target is, so it's a bad single target.
What are we trying to do here besides change for the sake of change?
PS, Voltaic Sentinel as a toggle is the bees knees.
PPS. End Drain against AVs and Giant Monsters is much, much harder than it is on live. They just immediately recover.