Multiple Duplicate and invert mask

I have 2 ideas. 1. Add a copy and invert mask all in one step not including adjustments - just the mask. This is all about saving time and removing clutter from the workflow. 2. Expanding on the previous, I photograph birds so I almost always create a mask of the bird and then an inverted mask. For the masks, I use standard Capture one Layer Names such as subject 1. It would be wonderful to be able to select a number of images and be able to copy and invert said mask such as subject one all at once to another mask.