Well,
Root with kingroot: Checked
Go to Replace KingUser with SuperSU: Checked
Unzip all in /sdcard/mrw/root.sh: Checked (well, it's /sdcard/Download/mrw/root.sh but that should be ok, right ?)
Use adb to become root: Checked
Launch /sdcard/Download/mrw/root.sh: Checked well, there's a bunch...