Seeing as one team has Nihilus everybody but Nihilus dies... Remove the eating power and Revan team still wins.
Nihilus may be weak but lets say he has the power he had in Kotor 2 for standard the power that we know off, it would still be enough to take out QGJ. Exile takes Mace, Revan takes Yoda. If needed with help.
QGJ isn't that good he's nice but nothing special. Council material apparently which something about the Jedi Council in that era.
Nihilus is nothing without his power he needs to eat other people to stay alive and keep his power. But in Ktotor 2 when you faced him he was okay, getting a lot weaker but still a challenge.
Well that's info straight from starwars.com. And Jinn was 60 at death. Not to mention standards for duling probably changed after the emergence of the Sith, especially after the Clone Wars. Jinn was obviously average at best when compared to ROTS Obi Wan, Anakin, Mace, Dooku, Yoda, etc. Even in his prime.