You can solo boost this with only one gold account, an Xbox One, and a 360 or another One.
You will need either two discs or one digital version for this method.
Note: To access the 360's home button (
) functionality on your Xbox One press
1. Make sure that you have completed co-op with your main account first.
2. Make sure one of the Xbox Ones is the gold's home Xbox (Settings > Personalization > My home Xbox). I will refer to this as the Gold Xbox One.
3. Log into the Gold Xbox One with your 2nd account and launch the game. Send your main friend request from the 360 dashboard (
4. Launch the game on your second console with your main account and accept the friend request.
5. Start co-op mode and invite your friend.
6. Complete calibration course and unlock the achievement.