[LG G3] How do I update to Marshmellow with a Rooted Device?

Actually... I'm not unrooted. I unrooted via Superuser SU, but I then remembered that I had TWRP and Xposed Frameworks still installed.
What steps do I have to take in order to update to Marshmellow from here? I've tried to search through many threads, but since I still have TWRP + Xposed Frameworks while unrooted, I think I may be a special case.

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