Ok, You're referring to conf. then.
Well, You can't promote by best record in your conf. alone that only gives the team home court advantage through the playoffs and there is the finals.
If you were referring to promoting by having the best record in all leagues in the division, then
I would say yes that's very trick it.
I did it once without even knowing in season 45.
Once I realized my team didn't match well against the other conference top team, but the 4th seed in our conf. did, I just played my bench to let them win and see if may be the can win the whole thing.
When the other two managers asked why I did what I did, I explained it to them, Diamantes which is the name of the team, was better match and I would rather just start getting ready for next season, that's when the manager of PV Pride who was the name of the team on the other conf informed me, that I was promoting no matter what cause I have the best record in the whole D3 division and for the second time in a row I went into D2 completely unprepared.....