I said it before but Scourge and in turn Necro as a whole, should be balanced around the choice of EITHER support or damage. Change Scourge traits to be either one or the other, then make them do exclusively that which they chose. Sand Savant could simply be "you now hit enemies instead of allies" or the other way around and then all you'd have to do is tweak some numbers. Barrier in that case could be personal only. Base line should hit both, but capped at 2 (2 allies including self, 2 enemies), then you get the choice to spec into support only, increasing target cap on allies at the cost of more enemy targets.