Mark, to me one of the many problems with astrological death predictions is that the experts do not agree on the basics of death calculations, leading to different asnwers, depending upon which method you choose.
There are many areas of astrology where I think it is acceptable to view prediction success as some kind of batting average, but I don't think death prediction is one of them. Three out of four accurate predictions, for example, is unsatisfactory, especially for native #4.
I have a fun challenge for members who enjoy death prediction. Get dozens of celebrity charts for older (or could-be older) actors, singers, athletes, &c. whose lives you've not followed: ones where you don't actually know if they are still dead or alive. Do not look up any further biographical details. Just the charts, ma'am, just the charts. Then write down a death prediction for each of them. Subsequently, check your success rate. Please let us know how you do!