I don't see any obvious issues. It might just be a painful process of keeping relight, then adding in 5 mods at a time, loading, seeing if crashes or not, and keep going until you find the conflict. Maybe one of those mods alters one of the same files relight does but I can't tell for sure. If you find the conflict in question there's a possibility a fix could be implemented, workaround, but you might just have to make a choice which mod to use if the conflict is too great.
2 years ago(+1)
relight standalone can be toggled on/ enabled before you start or load a map like other mods you might use. I didn't mean to give the impression that it was something you had to turn on ingame. I hope that helps