i was thinking party with give a boost in exp exp gained, an if you all are worried about level 80's shouting FREEE LEVELS. then make a level limit range of 10 or 20. can be above or below your level.
my answer --->
It's abusable, because one with a 80+ account could go and say "hey guys, offering free levling!". Lowies would gain levels faster than you could watch. And it's uneffective, because it'd either slow one down and speed one up or nothing changes at all. In other news: Unnecessary.
I love the party-feature in MMORPGs, but ZRPG is different than - for example - Guild Wars or World of Warcraft. The party faces the enemies all on its own, while in ZRPG the whole red
team is already a team and supporting each other.
Long story short: ZRPG is not WoW

first thing that would pop up is a glitch called login system ^^