This double effect of Muram's Vengeance and Aura of Taelosia is very nice!! Seems to me those are built for a DOT caster (I'm a druid currently saving DKP for this item!). But.. why oh why does it combine with a modifier of Backstab DMG: +10??
Would a rogue be attempting to backstab all the DOT casters I should think would want this item as well?