What is Nara's Strategy? Before the Allied Shinobi Forces HQ was


   destroyed and scene goes to the Four Hokages with Sasuke, Orochimaru and the others, 


was there is a strategy from Nara to be executed. If so, what is this strategy? 

As I remember when the scene goes back to the war,


   Naruto and others have difficulty fighting against Madara and Tobi with no any sign of Nara's strategy.
Nara's strategy had four components:


Shinobi Alliance create distractions
Naruto powering shinobi up with chakra 
Locking down the Juubi with the Shika Ino Chouji combo
The entire Alliance will attack full force at the Juubi


Naruto comes into communication with Shikaku here, as he shares his great Nara Plan. He also stated that he has told the entire alliance his plan already. However, the entirety of the plan is not revealed to the reader just yet. What they are discussing in this chapter is simply creating the distraction.
http://www.mangainn.com/manga/chapter/95742_naruto-chapter-612/page_9

Phase 2 of the plan begins here as Naruto starts to transfer his chakra to the Shinobi Alliance.
http://www.mangainn.com/manga/chapter/96726_naruto-chapter-615/page_20

Then phase 3 begins. Chouji is the front line tank along with many others. Ino uses her jutsu to take control of Obito and slightly throw off the Juubi's attacks. And Shikamaru and his clan use the shadowbinding technique on the Juubi. Also note that Shikamaru suspects that something may go wrong with this strategy and (in the flashback) Shikaku basically tells Shikamaru he is going to have to make that decision when the time comes.
http://www.mangainn.com/manga/chapter/97954_naruto-chapter-616/page_13

Phase 4 commences and the Alliance begins their attack.
http://www.mangainn.com/manga/chapter/98410_naruto-chapter-617/page_8

That pretty much sums everything up about Nara's strategy. The only problem was that it didn't work. Obito, Madara, and the Juubi are too strong to be taken down by the current Shinobi Alliance. That's when Minato shows up, followed by the other Kages and Sasuke and then everything changes again.



Additional proof Shikaku understood the Kyuubi's chakra transfering ability.
http://www.mangainn.com/manga/chapter/97954_naruto-chapter-616/page_8

Shikaku first learned of it from Kakashi's experience here.
http://www.mangainn.com/manga/chapter/98410_naruto-chapter-617/page_5