Shifnal had two star turns to thank for the third win in six games that stretched the lead at the top of Division One.
Australian paceman Chad Sayers added to his growing reputation with a seven-wicket haul as Leamington were bowled out for 222, of which captain Rob Williams top scored with 76.
And, although it took until the penultimate over to reach their target, David Pashley then took over as head of the operation.
The Staffordshire old boy batted through, hitting an unbeaten 110, supported chiefly by Bryan Jones (38) and Guy Home (31) as the visitors won with ten balls to spare.
While Leamington's first full game of this so-far weather-scarred season had good cause to leave them wishing it would rain again, Shifnal are now 16 points clear of Harborne, who pulled off a comfortable leg-spin inspired five-wicket win at home to Bromsgrove.
Leg spinners Stephen Moreton and his captain Jon Cockcroft each took four wickets as the visitors were bowled out for 207 before a solid partnership between Harborne openers Michael Powell and Simon Gear set them on their way to victory.
Former Bears captain Powell was snapped up for 37 but, supported by Dillon Du Preez (56), Gear stayed unbeaten on 89 to see his side to victory with with more than eight overs in hand.
Sutton Coldfield had Warwickshire's Tim Groenewald to thank for the 89-run local derby win over Walmey which shot them up into third. The young South African hit an unbeaten 60 with the bat, then starred with the ball too, making a double early breakthrough before returning to finish things off, completing figures of four for 13.
Halesowen's 50-run win at home to Water Orton was another victory inspired by two even more outstanding individual contributions.
Former Warwickshire trialist Sam Seadon warmed up for his Staffordshire debut next weekend with 121 out of Halesowen's total of 226 for six at Dog Kennel Lane. And that was then backed up by a fantastic effort with the ball from Imran Ali, who took eight for 42.
The day's other winners in Division One were Smethwick, whose four-wicket win at home to Wolverhampton sent the visitors to the foot of the table.
Lee Haynes was the top man as Cannock kept up the pace at the top of Division Two with a 109-run home win over Dorridge, the former Wednesbury wicketkeeper hitting 101. And second-placed Aston Manor won too, claiming a six-wicket win at home to Tamworth, youngster Chris Booth steering them home with 86 not out.
In Division Three, Steve Taylor's excellent ton in St Georges' draw at Beacon was enough to sneak them back to the top.
Newport, who began the day top, drop back to third after just failing in a victory chase at Berkswell, who also leapfrogged them into second.