The Group C game was the 40th and final of the Group stages, with the quarterfinals scheduled in Kolkata between September 9 to 12.
Second-half strikes from Youssef Atriss and Sergio Barboza Junior ensured RUFC claimed the second spot in Group B. Mumbai City FC had already qualified as group toppers.
Pedro Martin scored for the winner in the 83rd minute of the game. Odisha FC thus finished Group D with 12 points from four games and headed to Kolkata for the knockouts.
The first half saw six goals as East Bengal FC scored through Sumeet Passi (17', 34') and Silva (22') but Mumbai City FC came back from behind to make it 3-3 through goals from Greg Stewart (27') and Lalianzuala Chhangte (36', 43').
Suresh Methei, the skipper of the Services' side scored with a glancing header in the 33rd minute, which turned out to be the only goal on a tough evening in Imphal.
The Gaurs came from behind in the second half to share the spoils with Phrangki Buam and Lesly Rebello scoring to cancel out first half goals by Sunil Chhetri and N Siva Sakthi.
Spaniard Saul Crespo scored a brace while Jerry got the third; to hand the Juggernauts a third successive win in the tournament. All the goals came in the first half.
Greg Stewart opened the scoring for the Islanders in the 10th minute, with Lallianzuala Chhangte doubling the advantage in the 18th and Mehtab Singh adding a third in the 35th, to put the issue beyond RUFC in the first half itself.
ATKMB dominated the game in front of a crowd of more than 60,000 spectators. EEB also had chances, but had no goals after three games in the competition.
In order to give the Blasters all three points, Mohammed Aimen scored twice (in the 28th and 90th minutes) while Muhammed Ajsal scored once (in the 55th minute).
