[Arkham]

I thought about it, but ultimately Sionis is the one I'm familiar with. I'm fine with changing his personality from Insane to Ruthless if that helps make it feel more like Sionis. The theme being that Sionis would have no qualms about who he hires, is certifiably insane in his own sadistic way, and has taken over the Gotham Underworld on a couple of occasions as he's an expert strategist. So I felt that was more fitting to Sionis.

Jeremiah wouldn't be a bad route to take eventually. Perhaps with a more focus specifically on the Insane and working with the Arkham inmates directly.