Fighting for a spot in next season's Division Three, with Ballina already demoted, Nenagh - by virtue of their four-try 40-27 defeat of Monivea - top the table on five points alongside Rainey Old Boys.
Rainey picked up a losing bonus point in their second outing of the qualifiers - a heart-breaking 14-13 loss to Naas at Forenaughts on Saturday.
Naas fly-half Joey Moran - who was swamped by his celebrating team mates on the final whistle - struck a clinching penalty from the halfway line in the depths of injury-time.
The Kildare men led 11-0 at the break, but Rainey charged back through a Jerome McMurray try and drop goal, and Michael Glancy's penalty and conversion.
Moran, however, had the final say.
AIB League: Saturday, April 16 Results:
Monivea 27 Nenagh Ormond 40, MoniveaNaas 14 Rainey OB 13, Forenaughts
Round Robin Qualifiers Fixtures:
Saturday, April 23: Nenagh Ormond v Naas, Nenagh, 2.30pm
Saturday, April 30: Naas v Monivea, Forenaughts; Nenagh Ormond v Rainey Old Boys, Nenagh, both 2.30pm