Lisburn's loss meant that Instonians are Premier League champions.
Batting first, Waringstown posted 134 for 5 in tough conditions, with Graeme Hume making an unbeaten 49 from 47 balls (5 fours, 2 sixes).
Morgan Topping chipped in with 26, while Adam Dennison made 19.
David Simpson took 2 for 27, while there was one wicket apiece for Matthew Humphreys, Neil Whitworth and Callum Atkinson.
The chase never got going with Faiz Fazal dismissed in the first over by Ben Snell (2-17).
There were two wickets also for James Mitchell - including Nigel Jones.
Adam Berry made 20, but wickets kept falling with skipper Greg Thompson also picking up a brace as Lisburn were bowled out for just 73.