Shots in a mixed match on a hole with different pars

You can't ignore handicaps in this scenario. Even if all the players were off scratch handicaps the strokes given needs to be adjusted by the difference in the ladies and gents SSS.

i.e. if the ladies SSS is 74 and the gents is 72, the scratch handicap ladies would receive 2 strokes from the gents. If the stroke indices for gents and ladies are different it needs to be agreed beforehand (on in the conditions of the comp) which SI to use.