Well, 'The Mysterious Love of Dr Strange and Christine' is quite interesting. It starts with Christine being drawn into a mystery that only Dr Strange can help her solve. As they work together, their feelings for each other start to develop in a very natural way. This fanfiction does a great job of building the tension and the romance between the two characters.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). Just type in 'Dr Strange and Christine' in the search bar, and a whole list of relevant fanfictions will pop up.
One idea could be a what - if scenario. What if Strange and Christine had a moment of passion during a time - traveling adventure? Maybe they kiss in a parallel universe where they're not bound by the normal rules of their relationship in the main MCU timeline.
After the kiss, they could start secretly dating. Strange might use his magic to create private, romantic getaways for them, away from the prying eyes of the other Avengers or the magical community.
There's also a fanfic called 'Love in the Mystic Arts'. This one combines the magical world of Doctor Strange with the relationship between Stephen and Christine. It has some really interesting plot twists where Christine gets involved in the magical realm more than she expected, which adds a whole new layer to their relationship.
Reconciliation is another theme. Since Stephen's transformation has changed him so much, there are often stories about how they try to reconcile the old Stephen with the new one, and how Christine comes to terms with the changes in him and their relationship.
One great 'Dr Strange and Clea Fanfiction' is 'The Magical Bond'. It delves deep into their relationship, showing how they support each other in the face of magical threats. The story has a great plot that keeps you hooked from start to finish.
The magic could blend in interesting ways. Harry's wand - based magic might be enhanced by Dr Strange's more esoteric and hand - gesture - based magic. For example, Harry could use his wand to direct the energy patterns he learns from Dr Strange.
The appeal of Stephen Strange and Christine Palmer fanfiction lies in their complex relationship. In the original stories, there's a lot of unspoken feelings between them. Fanfiction allows writers to explore those feelings more deeply. For example, how Christine deals with Strange's new life as a sorcerer.