The DHA for Mista and Giorno seems to be a reference the White Album fight, particulary the way that Giorno appears from behind and jumps high into the air until he is directly above the opponent, then stomping down on them several times with Gold Experience, as well as the quotes "Resolution isn't all about sacrifice" from Giorno and "My true resolve begins here!" from Mista. The firing pose from Mista (which originates from the same fight), however, was used for Narancia's/Mista's DHA instead.
Contributed by ZpaceJ0ck0