Nagato with his enhanced vision from his rare, but powerful doujutsu, watches both Naruto, and Itachi closely for any signs of retaliation, or fleeing. Keeping a close eye on both of them, he quickly notices Naruto beginning to perform a string of hand seals, whilst releasing chakra into the earth beneath him, spreading it across the terrain.
At the same time Itachi stomps his right foot onto the surface of the earth, releasing a burst of chakra into the ground, channelling it towards Nagato, while simultaneously throwing a barrage of explosive tag kunais, several traversing a straightforward trajectory, while a few travel in an arc to the sides.
Nagato, with the Rinnegan, is capable of seeing the chakra travelling throughout the ground, while also capable of differentiating the signatures from each host due to the Rinnegan's ability to see chakra. The moment after Itachi throws the barrage of kunais, and Itachi's chakra begins to close in on Nagato's location, Nagato utters a few words near silently, while activating his first path.
The activation of the path is practically instant, as shown in the manga when he activated the path near instantly against Kirabi.
(Shuradō) - Asura Path
The exact moment after activating the path, the soles in the bottom of Nagato's feet begin to open. As this occurs, Nagato twists his lower body whilst leaning towards the left, keeping his upper body facing Itachi and Naruto, allowing him to view their movements clearly.
As Nagato finishes twisting his body, chakra begins to be released from the bottom of his boots much similar to thrusters on an aircraft, and keeping a close eye on Itachi's incoming chakra, just the moment before it reaches beneath him, Nagato gets sent flying towards the left, at immense speeds, barely dodging the fire pillars as they burst upwards, getting shot out of the kunai's, and four pillar bind technique's trajectory, hence avoiding harm.
Nagato is positioned so that his left shoulder is closest towards the ground, while his right shoulder is the furthest away. Basically his body is horizontal, but on it's side so that his chest is facing towards Itachi, and Naruto.
The speed at which Nagato travels is extremely immense, and thus he should reach the outside of the danger zone of the four lightning pillars, by the time the lightning from the four pillars begins to crackle, and released.
(Chakura Suishin Būtsu no Jutsu) - Chakra Propulsion Boots Technique
As Nagato takes off flying towards his left(your right), using his right hand, he grabs onto his left wrist. He then begins to dislocate his left hand, and using the Asura's paths ability, he begins to pull his left hand away, from his arm revealing a thick cord, with around a dozen missiles attached to it.
Nagato launches all missiles simultaneously from the cord, with three aimed towards the pillar to the right of Itachi, and the rest aimed for Naruto, his clones, and Itachi.
The missiles travel at an incredible speed, and have enough explosive power to destroy solid earth easily.
The three missiles, hit the pillar near it's mid-section, causing it to fall apart, sending the top half of the pillar downwards towards Itachi, and Naruto, while the rest of the remaining missiles, would've already exploded, and if not killed them, if not defended properly against.
(Kaiwan Misairu no Jutsu) - Flaming Arrow Missiles Technique
After having released the missiles, Nagato comes to a stop a meter from the border, between the two pillars, standing at around twelve meters from Itachi's current position(mid-range). Nagato using the Asura's path ability, begins to create two faces, one on his left and right side of his head.
Naruto performs hand seals | Itachi stomps foot, while throwing kunais.
I activate Asura path, and position myself.
Using Chakra Propulsion Boots I fly to the left as the pillars begin to erupt(fire) | Lightning.
Right after successfully invading, I dislocate my hand, and release the missiles.
I then come to a halt, forming the faces.
If you need a picture, I'll be willing to draw.
Regarding the formation of the heads, they don't count as a technique, as they're just like forming extra limbs, and from what I saw, that doesn't count as an actual move.