I did not come up with this strategy - I was able to witness it in a random game and then I taught my friends. There are lots of people that probably know this strategy but for those who don't - please enjoy :).
This is a real easy way to farm credits without exploiting or glitching the game, in my opinion, it's really a strategy and can probably be applied to other maps.
For this we did our gold run on Firebase White, fighting the Geth. You'll need at least one Salarian Engineer with a maxed out decoy (the complete load out is in the video). Everyone else can run what they would like. The rounds go much faster if everyone uses equipment.
The commentary was recorded using TeamSpeak, which we all prefer over the in game VOIP since it is extremely clear. You can hear our general shenanigans and just having fun while we do our run.
In this episode: We talk about drink preferences. We all love to sing. Sex dolls and natural disasters.
New Information regarding the "Invincible Geth". We currently have 3 methods of working around this in our games when it does happen. 1) We let ourselves die and let the waves end. 2) We kill everything else and watch the final geth just die suddenly in the same room we're standing in. 3) We kill everything else and leave the final geth in an area by their lonesome, they seem to instantly die of a broken heart. This method has worked the best for us.