Make a secondary account on the XBOX One. Since the XBOX One has the shared gold feature, your dummy account will also have gold. The dummy account is used to boost your partner's wins.
*Note: Make sure your dummy account finish the tutorials, this will save time.
You may have to boost late night due to the amount of randoms. 3-2-1 countdown works just fine. The time frame we did it on was 11:30pm PST. Just did it again with a Euro Booster at 11:00am PST, a few randoms maybe playing so just wait a minute for them to match up and search again.
League Promotions
League 1 to League 2: 3 wins
League 2 to League 3: 4 wins
League 3 to League 4: 4 wins
League 4 to League 5: 5 wins
League 5 to League 6: 5 wins
League 6 to League 7: 6 wins
League 7 to League 8: 7 wins
League 8 to League 9: 8 wins
League 9 to League 10: 8 wins
League Total Wins : 50 wins
We would just score a basket and the other would quit.