Well any kinetic shield that covered someone would do the job, or any sufficiently enchanted armour. en
If it were me, I would have built-in wards (maybe inscribed into objects like jewlery or tattoos). The ward would be early warning devices designed to either alert me to an imminent threat (perhaps even triggering a shield of some kind). Injun Joe uses shields that change the flow of magic so he is unaffected by frontal assaults. I wonder if some of the Senior Council have defences that make it difficult to use Kincaid-style tactics against them. Eb didn't even bother to shield against mortals with guns, his robes did the work.
But I think you're correct in that the best defence is adequate preparedness. Location, location, location.
Jim does love his family dramas. I wouldn't put it past him to throw some of that in there.