Chris Daniels led the way with 15 points and 21 rebounds. Stanley Pringle, Jerick Canada and Steven Thomas contributed 12 points each for the Warriors who outrebounded the Slingers 50-25.
The Slingers took charge early in the game. A dunk from Rashaad Singleton and a Wong Wei Long three-pointer resulted in a 13-6 Slingers lead with 3:49 left in the first period. Trying to enter the playoffs on a winning note, the Warriors ended the first quarter on a 9-2 run capped with a layup from Canada at the buzzer.
Down by 8 points with 45 seconds left before the half, Slingers star Rashad Jones-Jennings pulled his hamstring and had to be helped off the court. Jennings tried to give it a go in the second half but only lasted for two minutes before he headed back to the bench.
"As a competitor, it's tough to see Rashad [Jennings] go down. I don't want to see that. I know he tried to give it a go in the second half," Warriors head coach Todd Purves said.
"Obviously that made it more difficult for Singapore. But it was a great effort from them and I have a great appreciation for the Slingers organization."
Pringle put the Warriors ahead 37-26 with 7:52 left in the third period but Indonesia were still having problems with the Slingers. Phillip Morrison's shot with 5 minutes left in the period shaved the Warriors' lead back to three points. But that was as close as the Slingers got for the rest of the game.
Daniels found John Smith who made a great cut for a layup to put the Slingers away for good. Smith's layup with 2:58 left gave the Warriors a 51-39 lead and helped them improve to 16-6.
Singleton finished with 23 points and Morrison had 17 points for the Slingers. With the Slingers' exit, the Sports Rev Thailand Slammers are the final team to enter the ABL Playoffs and will face the San Miguel Beermen in the semi-finals.
"I guess we got what we deserved in the end," Slingers general manager Michael Johnson said.
"We didn't play well enough to deserve to make the Playoffs - and we didn't. And that's the way it should be.
"We had plenty of chances to play ourselves in and not rely on other teams - and we couldn't do it."
Quarter scoring: Q1(13-15) Q2(13-18) Q3(13-14) Q4(14-16)
Full-Time: Slingers 53-63 Warriors
Slingers: Singleton - 23, Morrison - 17, Cabatu - 4, Wong - 3, Folkoff - 2, Lim - 2, Jennings - 2.
Warriors: Daniels - 15, Pringle - 12, Canada - 12, Thomas - 12, Wuysang - 4, Sitepu - 3, Smith - 3, Swen - 2.