That would guarantee they stay in Belfast for the play-off semi-final, probably against the Ospreys. Ulster have already finished top of another table revealed here for the first time.
In a season when attendances have gone up at the majority of the RaboDirect PRO12 teams, Ulster's have gone up most of all. Their average of 10,307 represents an increase of more than 2,000 on last season.
Before long, they will have raised capacity at Ravenhill from 11,400 to marginally more than 18,000, enabling them to meet minimum crowd levels to host European quarter-finals and RaboDirect PRO12 Grand Finals.
Government funding will help pay for three new stands at a ground which has been synonymous with rugby in Northern Ireland since the early Twenties. Work is scheduled for completion by the end of next season.
Two other teams have seen their crowds rise by four-figure sums, both in South Wales. The Ospreys are up to 9,291 compared to 7,686 last season, the Blues to 8,933 from 7,275.
Attendances have also risen at Connacht, Glasgow, Edinburgh, the Newport Gwent Dragons and Leinster. The former European champions have the highest average at 20,000 as near as makes no difference, the figure increased beyond the capacity of the RDS since they switched the Munster match to the Aviva Stadium and almost filled every seat in the international arena.
Despite their elimination from Europe's premier competition, Leinster are on track for their first double. Saturday's Amlin Cup semi-final against holders Biarritz is the first of what could be five big matches in successive weeks, every one of them on home territory in Dublin.
The Basque club won the trophy in a penalty shoot-out against Toulon at The Stoop last year, Dimitri Yachvili's seven goals beating Jonny Wilkinson's six.
Biarritz, fourth from bottom of the Top 14 after heading the table during the early weeks, qualified for the Amlin, like Leinster, as one of the three best non-qualifiers for the Heineken quarter-finals. They made the most of their reprieve with five tries against Gloucester at Kingsholm at the start of the month.
For the veteran trio of Yachvili, Damien Traille and Imanol Harinordoquy, Leinster at the RDS represents arguably as formidable a test as they have had since Peter Stringer's blindside try for Munster unhinged them during the 2006 European final in Cardiff.
Ospreys follow Biarritz to the RDS next week for the last match of the regular PRO12 season, another of those from the must-win category for both teams - Leinster to make sure of a home semi-final, Ospreys to make up the play-off numbers.
When the Welshmen were last there, they won the RaboDirect PRO12 title in sensational fashion, Shane Williams climaxing an unforgettable final with the latest of tries for Dan Biggar to clinch the trophy with his towering conversion from the touchline.
The victory itself was nothing new. Ospreys had beaten the same opposition at the same venue in the first Grand Final two years earlier but another success next week will not be enough to climb back into fourth place unless the Scarlets finish up empty-handed at home to Treviso.
If they make home advantage tell this week and next, Leinster will then be back at the RDS for a RaboDirect PRO12 semi-final and they will remain there for the Amlin final on May 17 against Perpignan or Stade Francais.
No Irish team has ever won the second European competition although one club with strong connections went very close. London Irish took Gloucester into extra time at The Stoop seven years ago before losing a thriller, 36-34.
With every prospect of a climactic finish for Leinster before Brian O'Driscoll rides off into the sunset, the finale to the RaboDirect PRO12 season will generate large numbers across the board.
On previous weekends, the six PRO12 matches have been watched by average five-figure crowds. Gates over the Christmas holiday went close to reaching 15,000 per game.
The Easter weekend, featuring the first Welsh double-header at the Millennium Stadium, brought an average of almost 12,500. The fans also came out in force more recently, the six matches in Round 20 aggregating crowds of more than 60,000.
Average Pro 12 attendances (last season's figures in brackets):
Leinster 19,791 (19,023 + 768)
Munster 14,137 (14,798 - 761)
Ulster 10,307 (8,296 + 2,011)
Ospreys 9,291 (7,686 + 1,605)
Blues 8,933 (7,275 + 1,658)
Scarlets 7,803 (9,006 - 1,203)
Dragons 6,518 (6,098 + 420)
Connacht 5,154 (4,653 + 501)
Edinburgh 4,600 (4,252 + 348)
Glasgow 4,541 (4,018 + 523)
Treviso 3,510 (3,900 - 390)
Zebre 1,977 (first season)
Top attendances:
46,280 Leinster v Munster, Aviva Stadium, Oct 6, 2012.
36,174 Blues v Ospreys/Dragons v Scarlets, Mellennium Stadium, Mar 30, 2013.
23,587 Munster v Ulster, Thomond Park, Dec 29, 2012.
23,037 Munster v Leinster, Thomond Park, Apr 13, 2013.
19,443 Ospreys v Scarlets, Liberty Stadium, Dec 26, 2013.
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