How to make Faried and Rivers more effective and efficient vs GS and Bucks?

Faried and Rivers's impact is expected to be translated in the playoffs. There is no way to defeat GS and Bucks without their contribution.
Faried brings energy and excitement even though he isn't the best defender. He's a super athletic and energetic glass cleaner/rebounder and servicable paint scorer. He's a great bench energy that can give your offense more shots per possession He is a mix of Kevin Garnett's tenacity and Dennis Rodman's rebounding instincts.
Rivers has been a steady weapon from deep, even if he has his streaky moments and won’t hit seven threes too often as he did in a 15-point performance against the Nuggets last night. He would light up defenses from the outside, while also thriving in a fast-paced offense that allowed him to show off his creativity.

Faried and Rivers are not effective and efficient at all if they play 18 minutes (or less) each a game.
Let's say you have 66 minutes for the bench each game. How many minutes should Faried and Rivers play? Please be specific.
House 34 minutes
Green 12 minutes
Shumpert 12 minutes
Nene 8 minutes
Total 66 minutes

 

It seems that MDA has to give Shumpert a few minutes.

Price of Shumpert = 29 million

payroll 11 million
1st round pick (21st pick) 16 million (4-year rookie contract)
2nd round pick 2 million

note: unable to estimate the value of Knight expiring contract, could deal him/picks for a good player.