out of curiosity what kind of Elias/reader fics would you commission?
Elias x reader... The pinnacle of self-indulgence and my beloved. The short answer is "practically anything", while the slightly longer answer is "I guess fics similar to the existing ones I enjoy*".
The long answer is... I love fics with a power imbalance/where Elias shows control over the reader insert, whether SFW or not, because I'd never place myself in such a position in reality and it's cathartic to explore in fiction it's fun. I also enjoy fics where there's a sense of understated, almost parent-like (I know, I know; ask Sigmund Freud) affection from Elias. I'd say Hurt/Comfort is my favourite genre of reader fic. On the other hand, I greatly appreciate it when the reader is portrayed as sarcastic and there's plenty of bickering because it's fun and easier to see myself in.
...Of course, there are reader-insert fics in my writing folders right now, but if you follow me you've likely already seen me mention how bad I am at finishing tasks.
* My favourite fics right now are "Not Safe for Work" and blue_blue_electricblue's oeuvre.