I've been running a similar list with Covens, but I didn't think it was doing enough damage with fear. So I tried to add a bit more punch while still keeping some debuff.
Dark Eldar CAD
HQ
Succubus- Armour of Misery, Archite Glaive, Haywire Grenades
Elite
3x Grotesques
Raider- Dark Lance, Enhanced Aethersail
Troop
8x Wyches- Hydragauntlets, Hekatri- Agoniser, HWG
Raider- Dark Lance, Enhanced Aethersail
5x Wyches- Hekatrix- HWG
Venom- 2x Splinter Cannon
5x Wyches- Hekatrix- HWG
Venom- 2x Splinter Cannon
5x Wyches- Hekatrix- HWG
Venom- 2x Splinter Cannon
5x Wyches- Hekatrix- HWG
Venom- 2x Splinter Cannon
Fast Attack
Raider- Dark Lance, Enhanced Aethersail
Heavy Support
Ravager- 3x Dark Lance
Ravager- 3x Dark Lance
Harlequin Cast of Players Formation
Shadowseer- lvl 2, Mask of Secrets, HWG
Death Jester
5x Troupe- 1x Embrace, Troupe Master- HWG
Eldar Allied Detachment
HQ
Farseer- Skyrunner, Singing Spear
Troop
5x Windrider- 3x Shuriken Cannons, 2x Shuriken Catapults
Fast Attack
Hemlock Wraithfighter
So, Cast goes in the Fast Attack Raider, Succubus goes with Grotesques unless the Wyches are a better choice. Shadowseer and Fighter roll telepathy and the Farseer rolls more situationally, or probably just telepathy too.