Stop the War

Being back inside of her room, Ahsoka thought long and hard on what she would do. 'All this power. With just a single thought, I could reshape the entire galaxy. I could turn planets like Ryloth and Tatooine into a paradise while turning worlds like Coruscant and Alderaan into rubble. I could erase the Force itself and make everyone in the galaxy believe I'm a goddess.' At that thought, Ahsoka snickered. 'Well, I suppose I am already in a way, considering the fabric of reality has become my plaything.'

Then, Ahsoka became curious about what would happen if she never found the Infinity Gauntlet. The Mind and Time Stones lit up, and the vision granted to her horrified her. Barriss falling to the Dark Side due to her trauma, and subsequently causing an explosion within the hangar of the Jedi Temple. Ahsoka herself got blamed and cast out to die by the hands of Palpatine and Tarkin, only for Anakin to catch Barriss and set his apprentice free. However, Ahsoka refused to rejoin the Jedi. Then the death of both the Republic and the Separatists, replaced by an Empire lead by Palpatine. The Jedi, killed by the clones, who were controlled by control chips in their brains. Her master, turned into a partially mechanical abomination of a Sith, who she fought against on Malachor. She should've been dead, had it not been for a time traveling Jedi named Ezra. Entire planets such as Alderaan and the Hosnian system, obliterated. The First Order and Palpatine's return. Not to mention the Yuuzhan Vong invasion, causing over 300 trillion sentient beings to perish, and Abeloth escaping her captivity, bringing chaos to the galaxy. The sheer amount of death and destruction almost made her wish for it to be erased from her mind. But she didn't, as she could use this knowledge to stop it all from happening.

Using the Mind and Time Stones again, she looked how the Sith could've survived and found it. Darth Bane, last of the Sith at a time and maker of the Rule of Two and the Sith Grand Plan to destroy the Jedi and the Republic. Then she used all of the Infinity Stones to rewrite the history of the galaxy. She used the Space, Time and Reality Stones to reshape history, the Soul Stone to make sure that the people alive today would not be erased from history, the Mind Stone to protect her own memories while still allowing the new memories to take hold, and the Power Stone to power this immense task.

First of all, she caused Darth Bane to die of organ failure before he managed to get his own apprentice, ending the Sith once and for all. The lives of all Sith that came after Bane were radically altered. Some, like Darth Zannah, became Jedi. Others, like Darth Plagueis and Darth Tenebrous, became scientists. Darth Sidious, being a truly evil being since his childhood, has spend most of his days in prison. Maul and Savage never left the Nightbrother Clan, and Count Dooku never left the Jedi as Qui-Gon Jinn never got killed by Maul, though he is still critical of the Jedi acting like "the Republic's hunting dogs". Jedi Knight Ky Narec found Asajj Ventress and took her into the Jedi Order as his Padawan. The Sith never caused the destabilization within the Republic, causing many historical events to be altered. The Huk-Kalee war still happened, but this time when the Republic intervened it saw the situation for what it truly was, and placed the sanctions that Kalee would have had on Huk. Due to this, Grievous pledged his loyalty to the Republic, and became an important and well respected military leader.

Without the Sith Grand Plan, the Clones would've never been created, so in order to remedy that Ahsoka made it so Palpatine, during one of the times he was out of jail, wanted to create an army to take over the galaxy, and created the Clones trough secret laboratories and kidnapped Kaminoans. The army got discovered by Dooku, and Palpatine got put in jail for the rest of his life. As for the Clones, it seemed that the Kaminoans made them secretly loyal to the Republic to screw Palpatine over, so they had an easy time adjusting to the wider galaxy. As for Anakin, she made sure that he got discovered at an early age to put him with the Jedi, and made sure that he became Obi-Wan's apprentice after he became a knight. She didn't need to alter reality in order to make sure she got assigned to Anakin, Obi-Wan still made sure she was in this new timeline.

Without the Sith, the War also never came to be, and the Jedi who fell to the Dark Side never did. Anakin would never become Darth Vader, the Jedi will survive, and the Empire and First Order will never be.

Ahsoka then turned her attention to the threats of the Yuuzhan Vong and Abaloth. With Abaloth, all Ahsoka needed to do was to prevent her from becoming insane after drinking from the Font of Power and bathing in the Pool of Knowledge. Due to this, she became a creature of balance like the Father, and lived with the Ones in peace, undisturbed due to the fact that the Father and Abaloth never needed Anakin in order to keep the Son and Daughter in check. As for the Yuuzhan Vong, Ahsoka altered the history of their galaxy to make sure that the warring Droids there never caused conflict. The Yuuzhan Vong, not being invaded by them, retained their pacifistic life and quickly became a major political power in their galaxy. They retained their biological technology, but never gained their hate for mechanical technology. Eventually, the Yuuzhan Vong became one of the founding members of the Alliance of Peacekeepers, their version of the Republic. Now the Yuuzhan Vong never got any reason to go to this galaxy and invade, preventing hundreds of trillions of deaths.

Though, there were still many problems in this galaxy. For example, slavery. In order to combat this, Ahsoka made sure that Hutt Space fell along with the Brotherhood of Darkness, the last remains of the Sith Order. This effectively ended slavery across the galaxy, as the Hutts were the only obstacle to its fall that refused to fall themselves.

Now that the major horrors of the galaxy have been eradicated, there wasn't really anything major that Ahsoka could do with the Infinity Amulet to change the galaxy for the better without causing suspicion. 'Now what am I going to do?'