Boosting session info to get all 6 online achievements in one go:
Session time: around 3 hours
Select Xbox Live, Quick Match, Ranked
Have your boosting partner do the same.
You should get paired up in a lobby together as over the 3 hours I boosted on a Sat. night, we only ran into 3 randoms.
Start the game, wait until after the coin toss is over, your kickoff option will come up, now have the person losing quit out.
The game will give the quitter the loss and you the win.
I did this taking turns of 10 and keeping track with pen and paper.
After we had both reached 40, I had my partner quit out 10 more times.
(one more than needed to be safe, in case my count was off by one)
On the next match (the 51st), have the winning player score a safety.
Easy if you have your partner run the first play back into his endzone and you tackle him there.
After that, each of you can run the Clock play, Take a Knee, repeatedly, which will run the clock out for the rest of the game.
After the game, when your profile is saving you will get all 6 online achievements for 125g.
Don't forget to be a good booster and now do the same for your friend that helped you. =P