Sorry I've been stuck on Oreo for so long that it's taking me awhile to get up to speed.
Do you have the boot.img? I went on the spreadsheet under boot images but don't see the one I need for build 22.214.171.1247.1
Also patching the boot img with magisk would mean I could avoid temp booting TWRP?
yea I had to extract it from RUU zip with extract tool, but I thought I added a zip to the speadsheet...
I mean, I don't think you should be worried about avoiding twrp, but if patched, you just need to flash in bootloader mode so essentially not needing to hit twrp for anything if I recall correctly.