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.
Phase 2 of the plan begins here as Naruto starts to transfer his chakra to the Shinobi Alliance.
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.
Phase 4 commences and the Alliance begins their attack.
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.
Shikaku first learned of it from Kakashi's experience here.