Huge thanks to everyone who answered, especially Trikster, PR manager didn't even cross my mind.
I tried LCD but decided to set my starting five to ensure that my PG won't play C and etc. What happened was that my coach happily decided to let my starting five play the whole game, including my best player who has atrocious stamina.
Fortunately, they found some extra energy in the 4th and pulled off a great win which means I'm in III now.
Again, huge thank you to you.