After many restarts and dismal failures I did it ; Legendary Ironman XCOM 2 complete!
It’s a lot of fun; you always feel you’re close to death (at least at the beginning of the game) and the tension really gives you that “against all odds” vibe. I’ve collated some tips to help you retain some sanity when you start Operation Gatecrasher for the tenth time.
I’ve written a similar guide for Long War 2, here.
Also here’s a guide for War of the Chosen (the latest XCOM2 expansion).