I love these girls. One Deathstalker is nice, but a pair is awesome. Together they can inflict enough damage to cripple a unit. They stick and move, shaving off the front row and backing up. The fact that they have both Sniper and non typed damage is important for Legion.
These two followed my standard colour scheme except that I free handed some runes onto the cloaks to dress them up a little. I had painted (roughly) the Legion symbol on my Lylyth model, and felt as part of the same cadre the Deathstalkers would also have marks of prowess.