The guidance is for three or four layers that are set back at least an inch from each other. I chose to divide the exposed portion of the largest patch (i.e. what is not covered by the edge tape) into thirds.
The one patch that isn't triangular is at the throat. Many sails feature a semi-circle at this point, but I continued my 10% scheme and found that it results in a miniature version of the full lug itself. Once I realized that would be the shape, I was hooked.
Here they all are. This clearly shows how each patch is different in size. It looks a little awkward since they're so close to each other, but I'm confident they'll look good once they're attached.