sounds like your describing the ghoul knight build from http://deathknightbuilds.com/ (45/0/26) or something similar. I was tempted to spec my DK team this way, but I sorta never got around to leveling em. hehe. Well, to be fair, I was sorta thinking about trying to get blood aura on everyone (cause it stacks) + 1 unholy aura, and then get the perma pet talent on everyone too. Not sure how practical it is; but i'd be interested to hear if you tried it/how you liked it.