Wait, why is your phone bootlooping? What was the last thing you did? while it bootloops check repeatedly if you have access to adb by typing
adb devices
. If this was caused by just a magisk module or even if your not sure try
adb shell magisk –remove-modules
If that does not work you can also try to reflash the patched AND/OR non patched boot image. This will also fix some bootloops but im guessing.
Also to answer your question you could flash
this using the directions in the OP, and then individually download the updates from asus website and place the .zip in the /sdcard/ and reboot. It detects it as an update. Not sure if you can skip to the last one directly but I did all 4 just in case :S