Ok, ok, here goes some insight.

Absorb the Slaughter: the text is a bit confusing, you should rewrite it. As it is, it look slike targets you want to help are still targeted by a Death Kneel spell.

Aspect of the End Times: How can I say... This is scary. Really, really scary. Maybe you should tone down the extra crit range and multiplier. I mean, do you really want one of these guys using UMD on a Staff of Transmutation and firing a x4 damage Disintegrate? (160d6 damage )