I recall in an early podcast that coach Chad said that Lamarck was a good workout to test that you had assessed your FTP correctly. If you can do all 4 x 10 minute intervals then your FTP is about right. Alternatively you can use it a guide to assess your FTP. You do that by taking an average of the 4 intervals. No need to multiple by .95 or anything like that. Just use the average power not the normalized power.