A few different succubus loadouts I've used in the past...
Stuckubus: Shardnet+Impaler, Traitor's Embrace Relic, Cursed Blade cult, usually no warlord trait for obvious reasons, +Move drugs.
I run this one pretty commonly as my off-
HQ in a cursed blade battalion (the warlord trait generally goes on a pretty standard glaive+Blast Pistol succubus who runs with the troops to buff them). She'll win against a surprising number of targets in melee thanks to S4 and D2, but when she doesn't win, well, she usually wins the points trade anyway
Punchubus: Bezerk Fugue+Test of Skill, +A drugs, Precision Blows trait, Hydra Gaunts. Solid choice for Test of Skill wych cult
HQ choice.
Cccccombo attack succubus: Cult of Strife, Triptch Whip relic,
BP optional, Blood Dancer trait, +move or +A drugs. Often this one gets +move because +A is really good on bigger wych units, but I use this one as my off-
HQ when i want to bring Lelith to the table. Come turn 3, she gets really silly because blood dancer triggers on a 5+, so she makes many many many attacks.
Blood Glaive Succubus: I mean this one is obvious. The blood glaive is just really good. Don't bother with a blast pistol since it's Pistol 1 and you'll be advancing and charging with this gal.3++ is also very good with the
WL trait.