Great topic, Joe. As you say, I like one method. I find it is important not to get overly focused on the highest number humanly possible for a triathlete. If one is racing in aero for five to six hours and running a marathon afterward it is not helpful to work off a number that is inflated. Find a number from testing and prove it in the field with a solid run attached. If an athlete is strong one day in training resist raising FTP until you back it up over time. We all want to raise FTP. In triathlon I like to avoid raising numbers absent runs up to potential. As you know, this one of the issues that can arise from TSS and ATL or CTL. If FTP is not quite accurate all of the maths may suffer. Cheers