A Vow without honor is by far one the best Jamie Lannister fic out there. It has everything. Every character is on point, every interaction is in character, every character has their own storyline and in the middle of it we have Myra, a brilliant written OC.
It can be read on:
FF.net: https://www.fanfiction.net/s/10123639/1/A-Vow-without-Honor
AO3: https://archiveofourown.org/works/17062847/chapters/40121285
