There's some debate as to how powerful Wither is as compared with other spells. A buddy of mine grabbed this screenshot as he worked a rat spawn in Despise with his necro. When you look at this, it's clear why it's literally insta-death when you get 4 necros standing together at a drop-in or a choke point, and a player walks into it. There's nothing else that has this effect, this way of hitting *everything* at full force instead of distributing one amount of damage through all the targets. I hope that sometime, either chivalry can do this, or... something. It's one factor behind why the necro-mage is so desired for both spawn defense and working the spawn itself. The fact that Holy Light can be done while moving doesn't begin to balance it (heh). Click the image to see the full sized screenshot.