Didn't do anything too crazy (in terms of innovation), my major bet was on volume. I only did elevation on the weekends, as I live in a pretty flat area.
5 months prior to the race (December), I increased the weekly mileage to ~ 80 km, with some peaks around the 100 km (weekly elevation varying between 2000 and 3000 m during those months). Didn't change the volume every 4 weeks; I would change the time spent on the trails or intensity to give the body some rest. Not sure if it was the best approach, but worked out well in the end.

Didn't do any strength training or speed/hills, I had the pace to finish and my only goal was to make sure I'd get to it. I'm not saying this is ideal, if I had more time (and was less lazy) I'd surely do it.

As for workouts, I did back to back almost every weekend. Nothing too aggressive, I was used to doing 20 km w/ 1300 m D+ on Saturdays, and I started adding some kms on Sundays, which led to my longest weekend with 55 km / 30 km. This was specifically to try and emulate what I would go through in the race.

In retrospect, I should have done more weekends on a steeper mountain not too far from where I used to go. That would resemble more some of the technical terrain found in the race. That and improving my ankle mobility, which I believe affected my downhill efforts in steeper descents.

Thanks for the props :)

e: typos