A good friend and photographer once shared his tips with me about sorting through images.
Once he'd transferred the photographs from his memory card to his computer, he'd create a folder entitled 'good'. Then he'd flick through all of them. Each time one made him pause, it would be moved into the 'good' folder.
I just whittled down my 215 to just 8 in that way. He's a better photographer, he could end up with hundreds in there.
There would then be a second folder, located inside 'good', which he'd name 'better'. This was a more discriminating process. Each of the 'good' photographs would be subjected to proper scrutiny.
Was the composition correct? Was the lighting perfect? Was there anyone or anything photo-bombing in the background? If two or more were similar, which was the better one?
That would result in a much smaller gallery in his 'better' folder. Yet he still hadn't finished. A third folder entitled 'best' would sit in there. Now his 'better' photographs would be ruthlessly culled into the absolutely brilliant ones; and those would be used.
Like I said, he's a much better photographer than me. I stopped at 'good'.