I've been thinking up Scum squads all day and, try as I might, I can't see much of a role for the Scyk.
For me the problem is it just doesn't do anything particularly well and it seems to be overcosted by a point or two. A comparison with the cheapest TIE Interceptor seems to prove the point. Which would you rather have?
5 x Alpha Squadron TIE Interceptors
or
5 x Heavy Scyks with Mangler Cannons / 4 x Heavy Scyks with Mangler Cannons & Serissu
The 5 Heavies may have the edge with regard to damage output but they are less durable than the Squints and are not as good at arc dodging. The Serissu variant improves defence but reduces damage output, plus I'm not sure how valuable rerolling one green die actually is. I also don't like Serissu's chances of lasting more than a round or two of firing as her (?) ability doesn't affect her own defence dice. At least Biggs has five health to chew through; she has three and there aren't many Scum generics that can carry Draw their Fire to help her out.
I can't imagine running Scyk's with torpedoes or missiles due to the known problems with ordnance. HLC is too expensive and I don't see ion cannons and flechette cannons as being particularly effective, so really the Mangler Scyk is pretty much it. The other named Scyk has an ability that is so situational that I can't see it getting much play at all.
Am I missing something or are they really useless?