Instonians are Premiership champions in all but name after another win in a rain-affected game.
Waringstown were kept to to 92 for 6 in their reduced overs innings with Shane Dadswell and Cade Carmichael doing the bulk of the damage.
Carmichael has been a pivotal figure in their relentless march to the crown and he was in the runs again as they raced to their 20 overs target of 77 in less than 10.
Carmichael was unbeaten on 39, adding 58 in 6 overs with Shane Getkate (29).
Lisburn ensured the Premiership race went to the final match of the season with an easy 7 wickets win over North Down.
Ani Chore's 49 was the best of the home side's 116 all out - Tom Mayes making 24 too. There were three wickets apiece for the old firm of skipper Callum Atkinson and David Simpson, while Josh Manley and Matthew Humphreys picked up a brace each.
The chase was all about Faiz Fazal who hit 8 fours and 3 sixes in his 66 from only 50 balls, sharing a third wicket stand of 61 for the third wicket with Neil Whitworth (16*), while Adam Berry hit a few lusty blows in his 19 not out - the win done and dusted in 15 overs before the rains fell.
CIYMS warmed up for their All-Ireland final with a 21-run DLS win over CSNI at Stormont.
Ross Adair hit 7 boundaries in a joint-top score of 41 with Chris Dougherty as the pair added 76 for the first wicket.
They lost their way after that, including Mark Adair for a first ball duck - one of three wickets fr Connor De Wet.
Still, Jason van der Merwe (30) and Chris Robinson (20*) steered them to 207 for 9.
The hosts were set 129 in 20 overs, but managed only 107 with Ireland U19 international Harry Dyer (25) managing to make it up the motorway from Dublin Airport in time.
Skipper John Matchett took the bowling honours with four wickets, while Theo van Woerkom took three and Allen Coulter two.
Woodvale's clash with Derriaghy was abandoned at the halfway stage after the Queensway side had posted a competitive 221 for 6.
Replacement professional Rudi Second 64) shared stands of 66 for the second wicket with Ross Bailey (48) and 76 for the third with Sam Gordon - who hit 4 fours and 3 sixes in a breezy unbeaten 59.
Ruhan Pretorius and left-armer Stephen Bunting each took two wickets for the hosts.
The clash between Cliftonville Academy and Carrickfergus was another game to fall victim to the weather, making it just past half-way.
Head Coach Jared Wilson held the CA innings together with 78 not out from their 181.
Max Burton, Abhishek Raut and Varun Chopra all got 20s but didn't kick on.
Michael Rippon has been in prolific form recently and it was with the ball this time as he took four wickets, while there was two apiece for Ashwin Shetty and Craig Averill.
Carrick had reached 12 without loss when the heavens opened.