As a punchy type rider (possibly because of CX background), I’ve found that my FTP looks something like this: Ramp>20m>1hr, with a 15-20 range from top to bottom.
What is interesting, though, is that the 20m protocol (with the 5m effort first) done outside gives very similar numbers to the trainer ramp test.
I now generally add a couple of % to VO2 max workouts and pull a couple from threshold ones. Seems to work.
I’ve said before that IMO people get too obsessed with having one, single ‘right’ number; for most people, there is no one number which will apply equally to all types of effort. Find parameters that work for you and use them to train in the right area.