How do I prep for Marshmallow?

I am on stock rooted Android 5.0.1, 24B, Lollipop, and have bumped TWRP 2.8.7.0 I know that Andoroid 6.0 is supposed to be headed for the LG G3 in the next few months. I also, know that Verizon is painfully slow to update their phones. I wonder what the best upgrade path might be, for me? 1.) Wait for Verizon OTA, remove root and TWRP and then take the OTA? 2.)Wait for someone to build a rooted stock 6.0 ROM for the Verizon phone, VS985? Any ideas how I can get set, ahead of time, to be in the best position to move to 6.0?