Ninja World Tournament Rank S+ is unlocked upon completion of the previous one - S. It's the shortest stage of the ninja tournament - there's only one, single round of fights here. On the other hand, your team will increase to 5 members, and the whole round will be divided into 5 fights. You still have to collect the highest amount of Battle Orbs.
There are two novelties in this rank - there are no awakening / ultimate jutsu orbs to pick up here, so you won't be able to use them. The second one is that the enemies are in a state of permanent True Awakening from the very beginning - they will have a huge advantage over you, but it's the final test of your skills, so it's only natural.
To start the last stage of the tournament, go to the Teleportation Ninja and teleport to S+ Rank Tournament Reception. There are no shops, Employment Office or Challenges here - you can only start the tournament. If you want to buy some items, go to some other part of the island. If you want to begin the final round, speak with the NPC near the gate.
You will have to select 5 characters now. What is crucial, you won't have to fight with the character you've travelled the island with and you can swap it out with another one. While picking the characters, you should think twice, and select the ones you are very familiar with. This last round rewards characters with extremely long-ranged attacks (if you won't get stomped at the very beginning), mobile, like Minato or Shisui, who allow you move around the battlefield, or those who have incredible raw strength, like Hashirama.
Before the fight begins, it's a good idea to select appropriate items. There's no point to select offensive ninja artifacts (like bombs, or kunais), as they won't be of any use. A better idea is to use support items. The perfect choice is to select Substitution Logs, as well as books of the mind. They allow you to increase the regeneration of Substitutions, which means that you will be able to use them a lot more frequent - and as you will see, you will need lots of them.
You should also eat a Bento - you can lay a different effect on each of your characters. To activate a bento, get into the "List of items" before the battle starts, select the meal that interests you and use on a character you wish to empower. The best choice is to increase your defense and attack - thanks to that you will be able to "pull" more orbs from your enemies, while you lose less (A LOT less) if you are hit.
The last thing you should remember about - don't rush in the middle of the fight. Try to use hit & run tactics (unless you have a pure raw strength character, like Hashirama or Madara Uchiha), because otherwise you will be stomped to the ground. A good idea is to focus an enemy who has not changed his appearance after True Awakening - you can fight him more freely and hit him with your Jutsus.
Rewards for completing this round:
- Sasuke Mascot
- 500,000 ryo
Afterwards, there's going to be a short conversation, after which you will regain control over your character. Congratulations, you've finished the whole ninja tournament!