This article should have been posted alongside my earlier series on the statistics of various daemon units, but got omitted due to being lost in the warp for a little while. The question for this post is how many seekers of Slaanesh do I need in a unit to take care of various situations?
In common with daemonettes, the seekers of Slaanesh have rending claws, a bucket load of attacks and high maneuverability. But they are also fragile with a toughness of 3 and a regular 5+ invulnerable save (the latter is looking even more fragile in light of the Grey Knights release). So how many seekers will be needed to alpha strike (that is kill on the first turn of melee) a ten man marine squad?
Firstly, I'm going to assume that the experienced daemons player can avoid getting shot at with these cavalry before they get in to combat, and that they manage to charge the space marines. If this is not the case, then we can assume 3 could potentially be cast back to the warp due to bolter fire -- see the daemonette's statistics for a justification of this point.
The seekers have 5 attacks each on the charge, hitting on 4+ and wounding on 5+ (rending on a 6). Therefore the marine will take 0.417 "normal" wounds and 0.417 rending wounds. On average, 0.556 marines will die per seeker of Slaanesh that charged. Therefore, fully 18 seekers of Slaanesh are required to alpha strike a marine squad (or 9 seekers for a 5 man combat squad). This is less than daemonettes thanks to the extra attack, but its not all that efficient even so.
Light Tank Busting.
As with daemonettes, the rending nature of the claws of Seekers mean that they threaten light (AV=10) tanks quite readily. Even two Seekers will pose a problem for an AV=10 tank thanks to their rending ability -- that'll result in at least 1 glancing hit, probably more.