Just set the player 7 and 8 as computers. (Any civ)
The map as "explored"
Everything else to "Standard"
People can pick any civ they want but should let their team sets on "-". (Obviously they must not change their colour!)
Every player has a very specific role inside their team:
Players 1 and 4 are the eco guys, they provide resources to their 2 teammates, thanks to tributes. (Cannot do any army)
P2,5 are the military guys, they start at age 3 with an initial army. (Cannot do villagers or buildings)
P3,6 are the builders, they support their military ally, by healing and repairing his troops and providing him buildings(by building on roads with moss). (Cannot do anything to gather resources)
The map has 2 isolated areas for the eco guys, and one big battlefield for the others.
There's 4 victory conditions:
1: The military player obtains 6 relics. (P2,P5)
2: One of the two opponents dome of the rock is destroyed.
3: The builder player builds a wonder on his side of the battlefield (Road on the small island near the centre of the map surrounded by flags of the opposite team) and defend it for 15 minutes. (P3,P6)
4: The economic player reach 60000 gold. (P1,P4)
The AIs are hostile to everyone.
You can have more informations by reading the actual instructions of the scenario (the 3 check boxes menu in the top right corner of the screen)