Landings are like NPAs: there is a tolerance built in and I agree with other posters that this can be overthought. If you and/or instructors are looking at distances using 2 or 3 significant figures, it is bordering on unhealthy fixation on trivia. Really, if you can demonstrate a stable approach to flare height (25-30ft), check back a bit (2-3degs) and make it onto the ground without excessive float then it’s job done. The FCTM suggests that you should be touching down with ~150fpm ideally.
To be brutally honest, I’d rather see a “Boeing Standard” landing (firm-ish) than a failed attempt at a greaser. The 777 is a LH aircraft and on LH or ULH routes, on many occasions you have been on duty for some considerable time and may be landing somewhere unfamiliar in the dark in crap weather, or, more insidiously, in bright sunshine at 3am on your body clock. Finesse may be surprisingly lacking the first time you’re exposed to this so having a standard technique helps a lot.