P10 Plus VKY-L09 bricked, NO recovery, NO boot

[Gryphon]

Hi, I recently acquired a P10 Plus VKY-L09C654 which I successfully rebranded to VKY-L29C432. I then went on to force update it to Oreo, which also worked fine, but during the procedure I was supposed to root it, modify some files and then I could unroot; I used SuperSU's unroot method, but after this the phone seems to be fully bricked, only thing I can do is fastboot.
I tried these commands:
fastboot flash ramdisk RAMDISK.img
fastboot flash recovery_ramdisk RECOVERY_RAMDISK.img
from files I extracted from the UPDATE.APP I originally used for the Oreo upgrade, but still the same situation as before; when I try to boot, I get a NO: BOOT message, and the same for going into recovery. eRecovery is still working, as well, but that basically did me no favors at all.

I'm wondering here if DC-Phoenix would be able to fix this, be it through a downgrade to Nougat or reflashing any given Oreo firmware.

[Valdemaras]

Hello, can flash it using DC-phoenix https://www.dc-unlocker.com/DC-Phoen...epair-tutorial see guide for available repair methods.

[Gryphon]

OK, thanks. So, do I need to request a specific firmware version on the sticky post, or should one that's already available from your Support page suffice?