With the addition of the Aspect Host formation it's become super easy to add in a few select squads to plug gaps or get some extra utility units. The only problem is that they're lame craftworlders, I'm not really fond of their fluff and even with a matching paint job they just don't fit the aesthetics of DE army, so of course they'll need to be redesigned
First up, swooping hawks: Pretty straight forward, Kabalite Legs (since the actual Hawk models have their feet on the ground), Scourge torso (with only bird wings being used), Kabalite helmets with topknots (not Scourge since I want them to be easier to tell apart in case I field both), and for their gun I wanted something distinct so I went with a Shredder with the barrel replaced by a DL and the tip of a splinter rifle.
Next Howling Banshees: I wanted the running wyche pose, but wyches only have 1 armored leg which wouldn't do for banshees and their 4+ armor, so I took an extended armored wyche leg and paired it to a curled back scourge leg and I'm pretty happy with the result. Other than that there's a Kabalite pistol arm (needs armor so cant use wyches), I'll be using the Wyche power swords and Scourge Venom blades (with the poison channel cut back to look more like a power sword) and be putting them on wyche arms with various poses, and then Hellion heads for the banshee mask (there's only really one female hellion head I like, so I'll probably make a "stamp" cast of just the mask and use it to model hellion masks onto female wyche/kabalite heads)
Warp Spider: Kabalite legs, Crypt ghoul torso, Talos tail armor, and a shredder. I originally conceived this guy a while ago for use as an ally for a coven themed army (hence the wrack mask) but I'm thinking of going with the masked reaver/venom pilot heads instead to make him look more Kabal-ish. I'll probably end up sculpting some armor onto sides/back of the torso as well.
Fire Dragons: Don't have pictures for these guys but they're kabalites with Dark Elf Corsair cloaks and guns made from dark lances with the barrel removed (so they look like beefier blasters). then the heads will be the more dragony looking kabalite heads (mostly just the one with two big sideways horn looking things for the exarch).
And finally Striking Scorpions: I'm playing with two options for the legs, either cutting and reposing the Kabalite legs into a crouching position or doing a similar running pose like the banshees (or maybe a mix of both along with some standard Kab legs). Hydra gauntlets for their weapons (since they look awesome (but are so very terrible), and the more insectoid looking Kabalite heads (I'm going to sculpt their helms to have an old school incubi tormentor helm look to represent both their pistol and the scorpion sting).