What do you mean by super elevation ? Does it not the banking of rail lines ? I learnt banking of roads and rails which will be provided on the steep curves making one line upper line above from the line below in curving to avoid Train to go off the tracks in high speed.
Regarding Diamond crossing it is done at the lines crossing each other in angle of 45 degree which awes bhai told it's correct one.
Diamond crossing on curved or super elevated track may be possible I think...
more... but what will be it's safety that I don't know practically need to be checked about it..