Bummer!
I was hopeful you had not top oil properly last change, and exaggerated how much oil was coming out of air pipe. But apparently you did not, and know what you're doing.
I'd scope # 8 first thing. If cylinders wall scored, I stop there, to save time. Then start looking for a replacement engine. If #8 not scored, I'd move on to compression test rapidly of each cylinder, while still hot. Then wet, followed by leak down testing. I then scope any cylinders that fail testing.
I was hopeful you had not top oil properly last change, and exaggerated how much oil was coming out of air pipe. But apparently you did not, and know what you're doing.
I'd scope # 8 first thing. If cylinders wall scored, I stop there, to save time. Then start looking for a replacement engine. If #8 not scored, I'd move on to compression test rapidly of each cylinder, while still hot. Then wet, followed by leak down testing. I then scope any cylinders that fail testing.