A 'Doubles army' will always consist of two muster lists, one of which will be the Primary force, the other of which will be the Secondary force, each controlled by a different player.

Each muster list must be built to the same points limit, with each making up no more than half of the total points limit and following the usual rules for matched play army construction. Obviously, named characters are unique and each may only be included once in a Doubles army.

Teams should choose which army composition list to draw their Primary force from first, and then draw their Secondary force from either any of the army composition lists found under the 'Allies' section of the Primary forces army composition list, or from the same army composition list.

For example, Jonathan decides his muster list is going to be drawn from the Beastmen Brayherds Grand Army composition list. This means that Dave can draw his muster list from either the same composition list, or any of the options found under the 'Allies' section of the Beastmen Brayherds Grand Army composition list.

Finally, should one player's muster list have unspent points, these cannot be spent by the other player.

For example, Jonathan and Dave are playing as a team, each with a 1,000 point contingent. Although Dave has only spent 994 of his points, he cannot give his remaining 6 points to Jonathan.