Originally Posted by
Fueldrop
If you're going to go that route I'd suggest dropping their ballistic skill by one from current, representing them focusing on one aspect of combat at the expense of another (I'm kinda hesitant about having troops at WS 5 for any army, but it does very much fit with the fluff for them.)
Really, I'd be inclined to consider giving Bloodbrides the Precision Strikes and Rampage special rules, and giving witch derivative squad leaders +1 on their dodge save while in a challenge, to represent them being able to focus on dodging a single foe's attacks rather than having to watch a whole bundle of attackers.