Blood Weapon HP Drain

[Kabooa]

I don't think there's lore that say DRK is a vampire. If anything, DRK has a lot of association with giving up HP. But in either case, DRK has life steal where it is relevant: in large pulls, and for an indefinite amout of time given that resources are properly managed. WAR only has access to such a feature, realistically speaking, once every 90 seconds, and for only 10 seconds at a time.

In anything you're using IR Cyclone, it's probably dead in 10 seconds anyways.

[Chrono_Rising]

I don't think there's lore that say DRK is a vampire. If anything, DRK has a lot of association with giving up HP. But in either case, DRK has life steal where it is relevant: in large pulls, and for an indefinite amout of time given that resources are properly managed. WAR only has access to such a feature, realistically speaking, once every 90 seconds, and for only 10 seconds at a time.

Vampire no. Access to drain type spells and abilities, yes. Also a number of equipment types also exist to help counter the HP sacrifice abilities. http://finalfantasy.wikia.com/wiki/Blood_equipment

While these were not always dark knight exclusive, many of them were.