for adena drop to be boosted for the party, all characters must have prestige pack. even if the character is in a different region in game (but still in party). the only adena boost that is character dependant is the increase adena passive buff from the dual class skills.
drop runes behave the same way as prestige rune. all chars must have it to work.
xp runes are dependant on the individual character boost. the party just affects what xp is given to all members, then your boost adjusts from there. even if soeone has no xp runes, it doesnt affect the person who has them.
edit: on adena, if u make 1kk/hour with 1 person, each char should make 500k/hour when in party with prestige. it keeps dividing equally. If 1 char misses prestige, everyone looses the bonus