Un defeated Rainey are the new leaders of the Senior League after Ballynahinch dropped to third place following their weakened team's 17-14 defeat at the hands of Belfast Harlequins.
The Hinch pack dominated and Quins lost both props through injury so the scrums were uncontested after 64 minutes.
The home team had taken a 14-0 interval advantage when Ritchie Lobb converted a penalty try and one from Roger McBurney.
After the break, Quins' Liam Cambridge goaled a Neil McCombe try and, in the closing 15 minutes Michael Heaney broke for Andrew Pollock to touch down before Cambridge kicked a penalty.
Rainey ran in five tries in their 30-5 win over Malone with Michael Shiels scoring two and scrum-half Alan McCluggage contributing 12 points.
Prop Neil O'Kane was again on the scoresheet while Michael Barker ended an excellent handing move by the visitors in the first period.
Ballymena's 19-year-old Jordan Foster, who scored twice in the 34-11 defeat of Quins last Wednesday, ran in three more as the Braidmen beat Dungannon 44-8.
They were 24-3 in front at the interval and Tim Small made his first appearance of the season, since his return from Australia, and kicked two penalties and four conversions.
Banbridge led 29-12 going into the final quarter but Armagh fought back to gain a losing bonus point 29-24. Home left winger Hugo Harbinson showed his skills with a try in each half.
A few yellow cards were shown at Hamilton Park but Instonians, after being held to 13-13 well into the second period, piled on the pressure against the tiring Ards to win 32-13. Matthew Keane and Matt Kilpatrick each scored two tries.
* There was despondency at Donnybrook on Saturday when Ulster Under-19s lost 8-3 to Leinster, but when Connaught then beat Munster 10-7, the mood changed to celebratory as Ulster had won the inter-provincial title.