"Over" Sasuke's voice ripe with fatigue and anguish screamed out as he delivered a punch to Naruto's face, they were weary from fighting for hours using every bit of their strength nevertheless their battle carried on. The Final Battle surpassing even the Battle of the End, the conclusion of the Two Brothers.
"And Over again"
Naruto's body was forced into the air followed by yet another punch meeting his gut.
Naruto's hand made contact with the ground as he flipped and kicked Sasuke into the air with all the force he could put into it.
"WHY WONT YOU! JUST STAY STILL AND LET ME CUT YOU DOWN!" Sasuke's hoarse voice rung through the valley, his body plummeted down. A chirping noise signifying Sasuke's Jutsu ripped through the air as Sasuke's emotions poured into his left hand. One final chidori filled with darkness to end it all.
"Because that's My Ninja Way" Naruto replied in small chuckle as he forced one last smile while he poured his emotions into a single rasengan filled with his light as he then brought his Rasengan into the air to meet with Sasuke's Chidori.
As their Final Attack clashed, their power echoed through the valley, an array of light exploded from whence they collided, a final conclusion.
All that was left was smoke from where they met.
I tried my hand at a final clash where Naruto and Sasuke killed themselves with the jutsus, as you know their attacks didnt go the same way as in canon. Naruto's Rasengan was Inspired by Jiriaiya's death in Ninja Storm except he uses a normal rasenganalso i wasnt able to think of a good line to say that they both wiped themselves out in the explosion, so i hope the one i made was good enough.