Another Good option for getting around indestructible would be Sudden Spoiling 3 drop instant that turns all of a target player's creatures into into 0/2 with no abilities. Bonus is that since it targets the player, it also gets around pesky 'protection' as well.
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I like the addition of Geth's Verdict-I haven't found other vampire decks using it, and it fills in the holes in your 'destroy' effects. I'm not so confident about the Mana curve you've got though. You're relying on spells for mana 1-2, and you hit another creature drought later on. If you get nirkana revenant down, you'll be fine, but that's 6 turns at least you're waiting for. You're pretty much waiting on your destroy spells to keep you until you get enough land, and it's a shame to have to waste them on the lower hitters. Since you have 3 diabolic tutors in there already, it might be worth it to drop some of the copies of the higher up creatures since you can just search for them by that point, and replace them with some 1-4 vamps to fill out the distribution.
Have you heard about Measure of Wickedness? It's a killer card to use in a sacrifice deck. Easy 8 damage for 4 mana per card.