A fifth successive win lifted RCB to fifth on the points table
They added 140 off 78 balls after Pakistan had lost two early wickets in the chase.
RR is at second spot, with eight wins and four losses, giving them 18 points.
After excelling with the ball, Bennett took Zimbabwe to the next level with the bat.
Namibia have left an in-form all-rounder out of their squad for the T20 World Cup.
Ireland clinched just their second win over Pakistan with a five-wicket victory in the first T20 at a sun-kissed Clontarf on Frday.
Bangladesh clinical bowling spells helped them walk away with a 5-run victory over Zimbabwe.
Rajat Patidar (55), Cameron Green (46), and the spin duo of Swapnil Singh (2-28) and Karn Sharma (2-36) played their part in the big win.
SRH is at number three in the table with seven wins, five losses and 14 points. LSG is at the sixth spot with six wins, six losses and 12 points.
A superb batting effort from Fraser-McGurk, Porel and Stubbs took Capitals to 221.