This list is similar to one I played against before. It looked like a lot of fun to play. It comps at a 15.2. Basic idea is to use speed to choose combats. Soul Grinders can screen for the KoS when needed, and the mounted herald with Seekers works well as a flanker. Thoughts?
1 Keeper of Secrets
General; Magic Level 4; Lore of Slaanesh
Exhalted Gift; Lesser Gift (probably take the ASF sword)
1 Herald of Slaanesh
Battle Standard; Lesser Locus of Grace
1 Herald of Slaanesh
Magic Level 1; Lore of Shadow; Greater Locus of Swiftness
Greater Gift (probably ogre blade); Steed of Slaanesh
28 Daemonettes of Slaanesh
Standard; Musician; Alluress; Banner of Swiftness
27 Daemonettes of Slaanesh
Standard; Musician; Alluress
Banner of the Eternal Flame
5 Chaos Furies of Slaanesh
5 Chaos Furies of Slaanesh
9 Seekers of Slaanesh
Standard; Heartseeker
1 Soul Grinder of Slaanesh
Mark of Slaanesh; Daemonbone Claw
1 Soul Grinder of Slaanesh
Mark of Slaanesh; Daemonbone Claw