Wait, where is this going... if the shadow player uses a
whirling strike against gimli, and the dwarf prevents it with his armor, then loses the skirmish, does gimli take a wound since he is wearing the helm and can take but one wound during a skirmish? In that case I would be inclined to believe he would take a wound. However, if he loses a skirmish against a dmg +1 uruk his helm would negate the 1 extra damage and then the freeps player could discard 2 cards to prevent the other.