My current build:
Farming with MP2 is pretty comfortable, for Über-Bosses I do use another build of course, my current build is pure mass-destruction and not good for single targets.
I found out, that grasp of the dead fits perfectly in a Zombiedog/Sacrifice Build, because the "Death is Life" rune can also spawn new dogs. Same for the "Next of Kin" rune with Sacrifice and same for the "Circle of Life" passive. :) With decent pickup Radius beyond 20 meters (or yards or whatever), you can respawn your dogs pretty often if you manage to kill mobs near you and within Grasp of the Dead. The "Grave Injustice" passive is the key for faster cooldowns of the skills. So if I run out of Dogs eventualy, I usualy have the respawn skill ready, as long as enough mobs are around that reduce the cooldown.
The only thing I still want to find out is, what sort of Zombie Dogs I actualy should use. I have "Leeching Beasts" but they do not seems to leech anything noticable. Maybe I would need "Fierce Loyalty" so that I benefit from their lifeleech. I would trade the leeching Dog rune for one with more dmg but it seems that none of the runes make more dmg for Dogs. My old CC build (good old times) is not longer usable (burning dogs) since CC skills for WD are nerfed to nothing, sadly.