In some fanfictions, Ahsoka might save the Jedi Order by uncovering a hidden conspiracy within the Senate that was targeting the Jedi. She could use her skills as a former Jedi and her unique perspective outside of the Order to expose the plot and gain support from key figures to prevent the downfall of the Jedi.
In fanfic, Ahsoka's survival could be due to her prior experiences outside the Jedi Order. She has learned to be independent and resourceful. When Order 66 occurs, she has already established some non - Jedi relationships. These relationships come in handy as she is able to call upon these allies for help. Some of them might be smugglers or bounty hunters who are not directly affected by Order 66. They help her by providing transportation off - planet or by hiding her from the clones' search parties.
One possible reason could be her loyalty to her master. She has a deep bond with Anakin, for example, and this connection might make her want to stay within the order to continue to grow with him.
One idea could be exploring Ahsoka's immediate reaction during Order 66. Maybe she's in the middle of a mission with some clones she trusts, and suddenly they turn on her. It could show her struggle to survive while also trying to figure out what's wrong with her comrades. Another plot could involve Ahsoka finding other Jedi who managed to escape Order 66 and them teaming up to figure out how to deal with this new threat from the clones and the Sith behind it.
Ahsoka could face the challenge of time. If there is a ticking clock situation where the Jedi Order is about to be destroyed very soon, she has to act fast. And she may not have all the resources she needs. She might need to gather allies, information, and power, but there could be limitations. For example, some Jedi secrets might be lost, and she has to figure out things on her own without the full knowledge of the Jedi traditions, which can slow down her efforts to save the Order.
One possible plotline could be Ahsoka's immediate reaction to Order 66. She might initially be in disbelief as she sees her comrades turn against the Jedi. She could then go into hiding, using her skills to avoid detection. Another plotline could involve her trying to find other surviving Jedi. She might travel to different planets, looking for any signs of Jedi who managed to escape the initial purge. A third plotline could be her internal struggle. Ahsoka has a strong connection to the Jedi Order, and Order 66 would shatter that. She might question her own beliefs and what it means to be a Jedi in a galaxy that has turned against them.
Ahsoka's character often becomes more hardened. She has to face the betrayal of the clones she once fought alongside. This makes her more distrustful. For example, she might be hesitant to trust new allies in the fanfic. Her connection to the Force may also change as she has to rely on it more for survival.
One possible reason in the fanfic could be her disillusionment with the Jedi Council. Maybe she saw too many of their political games and felt they were straying from the true Jedi path. For example, she might have witnessed them making decisions based on power rather than justice.
Well, for starters, it would keep her in the Jedi Order's fold, which means she would be there for different battles and events. For example, she could have been a key player in some of the later Clone Wars battles that she missed in the original story.
Her departure could create a power vacuum in certain areas. Since she was a powerful Jedi, there might be regions she was protecting that now become vulnerable to the dark side or other threats.