Apparently what made this impossible was due to sensors, as I noticed some of my sensors werent working. That could have made me unable to flash anything but OOS. Anyway, the solution is to fastboot erase persist, and reflash persist.img (Instruct...
So now youre able to flash CM13 without bootloops?
Yep! Also make sure you are using official TWRP (https://dl.twrp.me/oneplus2/) Good luck.
http://forum.xda-developers.com/showthread.php?t=2520418 your compatibility pack is on this thread.