Guild Wars 2

Dungeon Party Boost:

While inside the dungeon:

Party gets +10% goldfind and +10% magic for each additional different class in their party.

If there are 2 guardian 2 mesmer 1 warrior party gets +20%MF and GF
If there are 5 unique class they get +40% MF and GF

LF1M CoE. No War, Guard, Ranger or Mes.

Like TheDaiBish said, this would really suck, and it doesn’t fit with the GW2 philosophy that everyone is welcome no matter what their class might be.