One possible fanfic plot could be that Eren has been planning this for a long time. He might gather intelligence about the Colossal Titan's weaknesses. Then, in a fierce battle, he manages to get close enough to deliver a fatal blow. This could be a very emotional moment for him as well, considering the history between them.
Well, sometimes he uses his titan's speed and agility to dodge the Colossal Titan's attacks and then strike at its nape. It's a classic way to take down a titan in the Attack on Titan universe.
If Naruto was an Armored Titan in a fanfiction, he'd be a force to be reckoned with. His speed and agility as a ninja would likely transfer to the Titan form, making the Armored Titan much more mobile. He could also use his Rasengan in the Titan form, maybe by concentrating chakra into the Titan's fist.
One idea could be that Naruto somehow gets transported to the world of Attack on Titan and gains the power of the Armored Titan. He might use his ninja skills in combination with the Titan's strength. For example, his shadow clone jutsu could be used to create distractions while the Armored Titan attacks enemies head - on.
The Ultimate Titan and the Hell Titan were the two BOSS characters in the Giant City Ruins Challenge Mode in Cross Fire. The Ultimate Titan was the BOSS of the 16th checkpoint of the Giant City Ruins. It had many skills, including Charge, Cannon, Energy Ball, Shield, Hell Cannon, and Thunder Pool. The Ultimate Titan's Charge skill had three enhancements. It could move three times and cause a small-scale explosion after colliding with an enemy. The energy ball was a slow-flying energy ball launched by the Ultimate Titan. It attacked the player with the furthest distance. The shield was generated after a certain amount of HP was lost, and the HP bar turned blue. After the shield was broken, the original red HP bar would be restored. The Hell Titan was a skill of the Ultimate Titan. It was a camouflage created by the Ultimate Titan, not a real body. The Ultimate Titan and the Hell Titan were both important characters in the Giant City Ruins Challenge Mode. Players needed to be careful when dealing with their skills and attacks.
In the game Titanfall 2, players could exit the cockpit of the Titan mech by pressing the square button on the controller or the "E" button on the PC. This way, he could leave the Titan mech and continue to operate or fight.
The Titanfall had three types of Titan Mech bodies: Ranger, Sky Map, and Giant Demon, which corresponded to Light, Medium, and Heavy Titans respectively. In addition, there was also a Titan Destroyer, which was a derivative of the Giant Demon level. These Titan Mechs had different characteristics and abilities in the game.
Titanfall 2 was a sci-fi first-person shooter game produced by Respawn Entertainment and published by Electronic Arts. This new game introduced a new single-player campaign, and players would explore the bond between Iron Warder and Titan. In addition, players could also experience more innovative and exciting multiplayer modes, including six new Titans, new Iron Rider skills, expanded customizations, new maps and game modes, and more. There was almost no difference between battle mode and battle mode in the game, but the way the story progressed in battle mode might make the player ignore the conversation and reduce the sense of immersion. Titanfall 2 received positive reviews after its release, and sales reached 10 million players.
In an Armored Titan crossover fanfiction, you could include characters like Erwin Smith. His leadership skills would be invaluable in a new and strange world that the crossover creates. Also, Historia Reiss. Her unique position and abilities might play an interesting role in the story. And if you want to add some mystery, Kenny Ackerman could be a great choice. His skills and his own secrets could add depth to the story.