I followed onimorzas instructions ( xposed on ODEX rom; yes it's possible now! (and with knox 0x0 too!) ) and flashed with latest FlashFire (not in Play Store anymore but google finds it)...
Finally got what I was looking for :)
Stock TW 5.0.2
rooted with kingroot (4.8.2)
removed kingroot with supersu me pro (9.3.6) and installed super su
installed xposed v80.1 (for non deodexed rom)
knox still 0x0