Perhaps this current document regarding STN will help clear the fog
Not as far as I can see. Those "C" plates are from the database using the temporary slope of 3.5°; all that needs to be done there is to load it up and let it go.
The OP, on the other hand, has a displaced threshold but the database approach takes him to the "normal" threshold ie 350m short.
In the big scheme of things though, 350m is equivalent to 60ft of profile error. If popping out at 3500m-odd from the runway at the MDA/DDA, that's going to put you only slightly low on the PAPI (if there is a PAPI at the displaced aim point). I'd be happy with that provided it is briefed.