One creative way is by using his Patronus in a unique way. His Patronus could be made to deliver secret messages to the other students right under Umbridge's nose. Since she can't really stop a Patronus, Harry uses it as a communication tool to organize against her rules.
In some fanfictions, Harry might use his knowledge of potions in a unique way to outwit Snape. For instance, he could cleverly modify a potion's ingredients during a class assignment in a way that Snape didn't expect, but which still produced the correct result. This shows his ability to think outside the box and use his skills against Snape's high expectations in the potions class.
In some fanfiction, Harry Potter might outsmart others by using his quick thinking and knowledge of magic. For example, he could use spells in unexpected ways to get out of tricky situations.
Fred and George Weasley are also favorites. Their mischievous nature can be amplified in fanfictions. They could create new and even more spectacular magical pranks specifically aimed at Umbridge, like turning her office into a never - ending maze of trick stairs and hidden rooms filled with various magical creatures that drive her crazy.
The development of their relationship in Harry and Umbridge lemon fanfiction can be quite diverse. It could be that Umbridge, in an attempt to control Harry more closely, gets drawn into his world in a way she didn't expect. Harry, on the other hand, might start to see through her tough exterior and find some vulnerability in her. This discovery could lead to a series of exchanges between them, some filled with tension, some with a strange sort of understanding, and over time, this shapes their relationship in the fanfiction.
Well, in many fanfictions, Harry might use his quick thinking and knowledge of magic. For example, he could use spells in unexpected ways to get around Fudge's plans. Maybe he uses a charm to make Fudge misinterpret a situation or forget an important detail. Harry is known for his resourcefulness, and against Fudge, he could use his skills to expose Fudge's wrongdoings or prevent Fudge from interfering in things that Harry believes are right.
There are fanfictions where Harry Potter outsmarts a powerful dark wizard by pretending to be on their side. He infiltrates the wizard's lair and gradually gains their trust. While doing so, he learns about the wizard's plans and weaknesses. Then, at the crucial moment, he uses this knowledge to turn the tables. He might also use polyjuice potion to create distractions or mislead the wizard and his followers, showing his clever use of magic items and potions to outsmart his adversary.
One interesting moment could be when Harry uses a little - known spell to escape Fudge's surveillance. It shows his knowledge and ability to think on his feet. Another moment might be when Harry cleverly plants evidence that exposes Fudge's corruption. It's a great display of his cunning.
In some fanfictions, Harry might outsmart Umbridge by using his knowledge of magic in unexpected ways. For example, he could use spells that are not commonly known to get around her rules. Maybe he uses a charm to make her quill write false reports, thus confusing her when she tries to use those reports against him.
Another idea is a time - travel fanfiction. Harry goes back in time and has to deal with Umbridge when she was a student. He tries to change her path so that she doesn't become the horrible person she is in his time. This could involve him befriending her and showing her the value of kindness and freedom.