I think there is way too much emphasis put on who needs what. Sure it's a small data point unless a team absolutely needs a game and the other team DGAIF. This game simulates a playoff game to both teams. But honestly, both of these teams are going to be giving a lot of effort to beat each other. This is a scenario I see play a out a lot where guys way overemphasize who needs what rather than just capping the game as if the starters were going to play. These head coaches are paid to win. Before every game they are usually telling their team to give the game 100% effort unless it's a unique circumstance. The more wins the head coaches get, the better chance they have of staying around. This is just my best guess at what I think is going on from what I've seen in the NFL. People can feel free to disagree with me.
I'd say cap the game as you otherwise would and don't try and level yourself.