This server could also include minigames that follow stories/event of the canon lore.
Like for example, I once suggested in RPG there should be a minigame, where you have to sneak in a firenations ship and collect as much any bedable blocks (or only coal if its bendable) from the compartment under the deck while being not detect by the firenation soldiers. The Time is limited, and the rescuer must collect enough and bring it to the earthbenders to allow them to fight for their lives and escape the prison or else they get massacred. (Reference to "Imprisoned").
Of course, some could even work well with collaboration with well-known mini games. For example The Equalist in the "The Walls" game. Two teams: chiblockers and benders. Chi blockers are fighting benders to death, and with the help of "Amon" (randomly assigned chosen leader of that team) they're goal to remove bending, in the minigame of course, from many benders as much as possible without killing them. The Benders, along with the avatar (also gets randomly picked) try to fight to prevent chi blockers from taking their bending and stuff. After the minigame timer runs out, points are calculated: If the number of people who didn't lose bending is greater than of those who did, the bender/good team wins. Equalist/Evil team wins If vice versa happens. Also, in-mid game the team immediately lose If their leader (avatar/amon) dies.