Warmblood, though my cursed blood should exclude me as a data point.

[D has not checked if the more unusual qualities of his blood persist because there's no way to do so safely.]

It shouldn't be too difficult to find volunteers for coldblood and vileblood. Trench native blood is easy enough to trade for as well.

[In fact, D knows one of each he suspects would readily agree for the Sleepers. He has avoided mingling too much with the natives. They won't come back if he loses control and kills them.]