Sage Jutsu chakra can only be used 3 times. Once inside Bunta's mouth 2 Rasen Shuriken were used to kill one of Pain's Five. Gazer used Reversed Summoning Jutsu through scroll to recall two Naruto's clones gathering Sage Chakra.
The way of life for ninja is hatred and to find a real peace Naruto needs to talk to Nagato. Is Naruto going to find the strength to forgive, or is he going to avenge all the village?