This all has been known for a while, but seeing as the current weekend objective is to complete a match on gold, I thought it should be posted in its own thread.
Play Firebase White with Geth as your enemy.
Go to the area in the video below, and STAY THERE. Don't move unless there is a hack or four data terminals objective. If there's an enemy targets objective, they'll almost always come to you.
You want at at least one or two people with the decoy ability, and one person with a cloaking ability.
If there's a hacking objective, you all need to go there. If there's a four data terminals objective, only the player who can cloak should go after the objectives. The rest of the players should continue to stay in the main room, and keep the enemies busy.
Once you reach the extraction wave, everyone should stay in the main room until about 30 seconds before extraction. Then you all should drop some fresh decoys, cloak if you've got it, and run for the shuttle.
Congratulations, and enjoy your 70,000+ credits. If you had your data feedback set to ON, you should be getting an N7 weapon sometime on Tuesday.