Another newbie, planning to start Raspy to do demo games with my McMourning crew, mostly because I like the model/fluff. Now, I'm aiming at 25 SS, and that seems to really limit your options.
So, reading what people are saying in this thread and in the others of it's kind, Raspy likes to sit back, and bombard things with her spells. So, Essence of Power (2SS) seems like a good starting point. Silent One's look really nice, and have a lot of synergy with Raspy, so one of them, please (6SS). Ice gamin... seem to give a nice boost to the casters, so one of them could join the crew as well (4SS). The bugger can also serve last line of defence for Raspy? Unfortunately, you have to move around in this game, and Cult of December seems to be bad with that. So, enter Snow-Sabertooth-Ceberus, who can at least move (8 SS).
And that leaves me with 5SS to be used. Another gamin? Or drop the totem and go for Acolyte (utility) or second Silent one. I don't need a one list to kill them all, just fun, and playable crew to take on mcMourning.