Currently vampire blood is a bit useless/confusing.
Either remove or make more interesting (see also #1070).

Remove

• Replace with soul orbs in tasks requirements
• Replace with water for pure blood downgrade

Make more useful

Combination with holy water

• Combing with holy water could trigger an exothermic reaction, thereby acting as powerful fuel for furnace or other mods

Vampire blood is using for the hunter leveling at the first levels and in the blood potion table crafts so with which item they would be replaced in case of blood will be removed?
But if the vampire blood needs to be more useful, then there are few ideas:

1. There can be a vampire ashes or some kind of powder that is created by an exothermic reaction and acts like a blaze powder
2. There can be an alternate craft recipe for the sanguinare injection with vampire blood instead of fangs
3. If there will be an oil against vampires then there can be oil made with vampire blood that acts well against hunters or another beings
4. There also could be a way to enhance vampire weapons with the vampire blood and other materials (I guess this could work if all weapons with tiers would be able to be upgraded so enchantments would keep on the weapon)

Vampire blood has always been a bit of a bothersome item to me; vampire progression reaches a bit of a standstill where you're essentially farming mobs in a forest to finally get the items you need.

I'd love to see the other dimensions incorporated into progression, especially the Nether which holds a more undead/hellish theme befitting vampires.