My group is having a difference of opinion over what a "set of wounds" means in the context of healing magic (which can be applied once for each 'set').
Option A: A set constitutes a number of injuries.
Option B: A set constitutes a number of boxes of damage from an individual injury.
Let me expound with examples:
Example A: Ronnie gets shot twice and stabbed once for a total of 6 boxes of damage. When Johnny the mage reaches him, these wounds constitute a 'set' of wounds. When Johnny works his healing mojo, he can use his spell once (healing 4 boxes of damage). Ronnie is now only 2 boxes injured. Further applications of the spell will not improve Ronnie until Ronnie gets hurt a fourth time.
Example B: Ronnie gets shot (for 2 boxes of damage), shot (for one box), and stabbed (for 3 boxes of damage). Each wound is a 'set'. Johnny can use his healing magic up to 3 times on Ronnie, once for each injury. Assuming Johnny can heal 3 boxes each casting, Johnny can completely heal Ronnie with three castings of the spell (though Johnny now has to withstand drain 3 times).
We can't find any rules or published examples that settle this argument. How does your group interpret it? (And if there is an example anywhere in the text that establishes this one way or the other, please point me towards it.)