I had thoroughly enjoyed "This Was Easier on the Tabletop," which has been mentioned on here before. Looking around for some other Isekai/isot/is stuff some mentions on the battletech forums led to some stories on the Sietch, another fiction forum. One which I have been enjoying is this one:
https://www.the-sietch.com/index.php?th ... ross.9316/
It's still young so we'll see if it keeps up, but it seemed like one to share.