10/10
Everyone saying its just a 8/10 are missing the point of the awesomeness of the fight. At some point late in the 1st or early in the 2nd both men were putting on a pace on the other that they were both completely exhausted and mostly throwing power shots to hopefully KO the other man, and many of those shots were still landing. The only thing that kept them going was heart.
Heart. The one aspect of MMA that's rarely mentioned, which 'toughness' is usually used as a synonym but it isn't, the determination that they will not quit and will do absolutely anything to survive and keep on fighting.
Bonnar/Griffin1 is the #1 example in all of MMA of heart, like both fighters were their own version of Rocky Balboa.