Master/Servant pairs in the War (this is going by respective order):
Yugi/Atem (Saber)
Mokuba/Seto (Archer)
Malik/Winged Dragon of Ra (Berserker)
Thief King Bakura/Diabound (Avenger)
Shizuka/Jounouchi (Lancer)
???/Mai (Rider)
???/Ryou Bakura (Caster)
Zorc (Secret Master)/Yami Bakura (Assassin)
more stuff about canon-swapped DM characters go here
Yugi/Atem (Saber)
Mokuba/Seto (Archer)
Malik/Winged Dragon of Ra (Berserker)
Thief King Bakura/Diabound (Avenger)
Shizuka/Jounouchi (Lancer)
???/Mai (Rider)
???/Ryou Bakura (Caster)
Zorc (Secret Master)/Yami Bakura (Assassin)
more stuff about canon-swapped DM characters go here