I thought I'd offer a little advise to those who use VC's and their uses.

Reasons I use VC's:

1. Summon Lammashatas (Go immortality)
2. Cut supply lines inside your dominion without fear.
3. High Surviviable Leadership with Stealth (Important midgame after you've steamrolled 2 or 3 people and people trying to assassinate, etc).
4. 2 Death and 2 Blood allow you to summon Bane Lords and Blood Thorns.
5. In a Communion can Drain Life like a Champ.

All of these things make me use VC's. Don't look away from the good advise of some of those here, but also don't forget the lowly VC. He fills a gap for BF Ulm and can be changed to suit your needs because of his Blood-Only Resource cost. And until you need him he can provide you with Slaves to feed your ID addiction.