Party

Party Members
Up to 4 members (including the leader) can join a party. The stats, boosts, frenzy, and enchants of all members will be combined when battling in party. This means you can fight higher mobs and gain more gold per action. Resource type enchants cannot be combined with the rest of the party.

Battle
The actions you see are the personal actions you can do for the party, not shared with other members. The loot you gain while battling in party is also your own. Party actions reset every day at 00:00 server time (UTC), or according to your personal reset time (found in the settings). The party actions you get at reset are 10% of the actions you did that day, so if you do max actions in a day (14,400) then you will have 1,440 party actions the next day.

Party PvP
You can engage in PvP battles with your party in the "PvP Rankings" tab. Introduced in patch 1.3.6, your party ranking will determine the additional boosts you receive towards the rest of the game. You may battle with any party that is of a higher ranking until you lose 10 times. This number will reset each day and is independent of each party member.

There is also a tournament that runs daily from 12 to 23 UTC. The purpose of this tournament is to automatically determine party rankings with a tournament bracket.