This build is to suprize your opponent with very quick damage right on top of them
Cast zombie dogs
Cast spirit barrage (manitou) - spirt hovers over your head for 20 seconds
cast spirt walk (umbral shock)
run over to where an enemy player is
cast soul harvest (vengful sprit)
also triggering spirit walk damage
then since your zombies teleported on top of you (least thats what happens in the videos). you cast sacrifice
107-178 * 4 = 428-712
hopefully your manitou would have also shot him at least once
then you cast firebats and try and kill them before they run away.
total damage should be 762-1220 not including what you can do with firebats and the % increase from soul harvest. This hinges on the fact that your dogs teleport to you when you pop your spirit walk.