I have been planning to add a small allied contingent of regular 'ole Dark Eldar to my force so I can legitimately field a Ravager with Haemonculus crew without having to go full unbound.
I haven't really decided if I want it led by an Archon or a Succubus, but I know whatever I pick I want it to be wearing the armour of Misery to make the most of the freakish spectacle rule by stacking leadership debuffs.
I'm leaning more towards a Succubus because she can bring an Archite Glaive to help with AP2, I'm planning for her to be hitching a ride with the other squad of Grotesques from the Grotesquerie in a raider, and I hit on the idea of just having a really marshal character, more like a lone Incubi badass mercenary than an actual Succubus as I'm not planning on bringing any wyches.
For some bizarre reason, I have a complete set of the Asdrubael Vect metal components floating around, including the badass trench coat Incubi, but I wanted to give the model more character so I gave him a Casshern style half-helm (which was absolute misery to carve into just the right shape.)