Leaders Ulster set up Scarlets semi
Ulster earned a home semi-final against the Scarlets by seeing off Cardiff Blues 37-13 at a wet Ravenhill to finish top of the RaboDirect Pro12 table.
Two second-half tries from Andrew Trimble and a late score for 100 cap man Robbie Diack helped Ulster on their way after Mark Anscombe's side had trailed 13-10 at half-time against a Blues effort which petered out in the second half.
Ruan Pienaar ended the night scoring 22 of Ulster's total with a first-half try along with four conversions and penalties on a night when Chris Henry also his 100th game for his club.
It started badly for the hosts when Dafydd Hewitt scored by the posts after three minute, but that was their only try of the game, as Rhys Patchell scored a goal, a penalty and a drop-kick in the opening period before Ulster claimed the lead and never looked back.