I maxed out the prestige which answered my question posted earlier and brings me to suggestions.

1. Raise the level cap so we can max all our weapons out.

2. Take a page from Borderlands and have Raid Bosses.

The way to implement the raid bosses could be through raising the level cap as players max weapons Raid Bosses become available to fight. The would drop lot's of coins and chips and maybe even special loot that would unlock for sale.

3. There should be loot chest hidden around larger maps to encourage exploration of the map. Maybe lower level characters could find tokens or something that would let them have a shot at the Raid Bosses. Of course they would get smashed but at least they could check them out if they lacked the dedication to max everything out.

When a player unlocks a raid boss other players should see them waiting to fight the boss rather than sending the player in alone. The whole point of a raid boss is they can't be beat without multiple players cooperating. Once the raid boss is unlocked it should cost a price to fight it again no matter what the previous outcome of the fight was. Players should loss in the fight more than they win so when a team does win the victory is worth it and rewards should be worth the cost of fighting.

Just check out how the Borderlands games does raid bosses and I'm sure your team could work something out probably even better than I'm suggesting. :-)