[quote=@Hawthorne]
Also viable, though I suppose that runs into the problem of people with Physical Gifts being wholly unable to deal with Spiritual threats and vice versa-- though that in itself is an interesting concept to explore. 
[/quote]

I wasn't really even thinking about separating damage types. more that shrugging off an axe blow using a force field (spirit) and using an metal shield (physical) have the same effect, which is not dying. Same with punching/blasting something really hard or shooting an arrow/lighting bolt with incredible accurately.