Chris Bosh and the Heat’s “expendables” — as Shane Battier playfully dubbed them — continued their playoffs-can’t-get-here-soon-enough schedule stretch Friday, tormenting the Bobcats with a barrage of Mike Miller three-pointers and throttling Charlotte’s woeful offense in the second half to draw closer to clinching the league’s best record.

With LeBron James and Dwyane Wade again sidelined and Ray Allen joining them, the Heat held off a Charlotte team that couldn’t shoot straight, winning 89-79 at Time Warner Cable Arena.

With any combination of three wins or San Antonio or Oklahoma City losses, the Heat will clinch the league’s best record, which would assure home-court advantage in the NBA Finals. The Heat already has clinched the best record in the Eastern Conference.

The Heat got 26 points from Miller, 18 from Bosh and 14 from Rashard Lewis on a night it made 13 of 33 three-pointers.

Miller had seven of those threes, on 11 attempts, matching his seven three-pointers in Miami’s Game 5 NBA Finals-clinching win last June. This was Miller’s first game with at least 25 points since January 2011.

“It’s great to see Mike that aggressive, with that mind-set,” Heat coach Erik Spoelstra said. “He’s a big-time weapon we have. He has absolutely bought into the sacrifice. You can see his value. He’s unique with his size. He can get a shot up against a lot of people and can put the ball on the floor.”

Even without Allen, the NBA’s all-time leader in threes, Miami tied a season high for made threes in a half with 10 before intermission. The Heat’s 22 first-half three-point attempts were its most in a half this season and its 33 attempts overall were four short of a season high.

“Offensively, the ball was moving,” Spoelstra said. “We were finding open shooters.”

Miami had only three three-pointers in the second half — all by Miller — and instead generated several easy baskets in the paint, including a couple of dunks by Chris Andersen, to stretch a three-point halftime lead to 13. And a Miller driving layup with 1:42 left was big after Charlotte closed within six.

“My body feels good. It’s good to be healthy,” Miller said. “I’ve had to be patient. We’re trying to get our rhythm just in case [the team] needs us in the playoffs.”