Can't Danzo catch Kakuzu off guard with Izanagi and take out one of his lives? Assuming it was the Katon heart, Danzo wins via Baku. Danzo kills Raiton heart and he has good chances at fighting without remorse. Takes out Futon heart and Danzo's able to stay in CQC and land Genjutsu without much problem. Takes out Doton heart and Kakuzu lacks counters to powerful Futon from his anterior while Baku is summoned from his posterior (which is rid of by Futon, but doesn't matter since Danzo still kills Kakuzu from behind). Don't know why he's being so underrated here, Danzo can take this.