Housing Assistants
I've been working in an informal way to have people doing patrols of the city, when we were having difficulty with vampires earlier, we had informal patrols in the tower. We certainly have the skill set -- although perhaps some training may be necessary still, the different worlds, different ideals, could come into play here.
If we had a pool of people - from different floors we'd likely always have someone within a range of 2 - 5 floors that could be available. I think it's definitely worth looking into.