The Blood Pact elite are the Death Brigades.
I love the look of the Death Corp Grenadiers and think with the addition of Khorne brass etch they fit right in.
The skull esque gas mask really screams grotesque when painted boltgun metal.
I plan to use them as stormtroopers so is a Valkyrie far off behind?
This is also a good way to get mt Death Corp fix without getting sucked into buying a full army of them.