I've tried http://forum.xda-developers.com/show....php?t=2432476 LG G2 Stock Firmware (Go Back to Stock) to no success, I was able to flash, it removed TWRP but I get the same symptoms anyway.
I've tried flashing the Rogers modem and this did not make a difference.
When I noticed this problem was when I was installing/testing some xposed modules, although it seems strange that they could break the phone in this way.
I've run out of ideas and although my phone isn't bricked per say it's near useless if it's going to reboot every minute or two. The phone doesn't reboot if I leave it in download mode or TWRP so this makes me think there's some hope.
Assuming it's not against the rules I'll PayPal anyone who comes up with the fix $50 CAD because right now I'm hooped.