I'll take this place to link 3 of my playlists here that might be useful as guides. As a general disclaimer, some of the videos might have been recorded on older versions of Long War of the Chosen, so please check the pinned comments in the videos for any significant changes since then.

First of all here is a playlist with general guides for LWotC. This is a work in progress and further guides will be added in the months ahead:
https://www.youtube.com/playlist?list=PLtdFbHeD9CNyrsvo2NS7zA-wuwxCriRGi

The there is this class guide series with an in depth view on the talent choices for all the classes:
https://www.youtube.com/playlist?list=PLtdFbHeD9CNw7vuWtVgVfwc5B9gJDFSop

Finally, while not technically a guide, this is a playlist with all the Chosen Encounters from my most recent LP series. This is hopefully helpful in understanding how the Chosen and their Reactions work, and how to counter and defeat them. Once again: some class and Chosen abilities might have changed since these were made. I will replace this with a more current list once I have it:
https://www.youtube.com/playlist?list=PLtdFbHeD9CNyB6j9A3ctK92FYGEks_6nC

Buenas, dejo por aquí la guía que creé en español hace un tiempo para Long war; está actualizada para servir también con la adaptación de este mod a War of the Chosen, gracias, felices fiestas!

Hi people! in my case I will provide a spanish guide, for long war 2 base and wotc, maybe using translator it will serve for all people of another language, Merry Christmas!

https://steamcommunity.com/sharedfiles/filedetails/?id=1367013785