I have seen several things come up in search for "One Click BIOS Editor" -- can you link me to the one that you are referencing ?
https://github.com/jaschaknack/PolarisBiosEditorLooks like newest version 1.6.7 mentions that it requires some mobo tweaks to properly use, so if you can find 1.6.6 for download that was the one I used. Simply load stock bios into program, hit "One Click Timing Patch" button, then save bios as new file, then flash it to card, then apply pixel patcher, then reboot.
And if you don't want to use 1.6.7 due to the mobo tweaks, and can't find 1.6.6 listed for download, I had uploaded it to google drive the other day for someone else...
https://drive.google.com/open?id=1h0vQrI_k3C_soxqBAAnvFxrZdqI4UeSs ....I can guarantee no fuckery involved with the file, but if uneasy downloading from me I fully understand, I personally just couldn't find the list of previous versions on the github.
I've only tried the One Click Editor with a Gigabyte 2GB RX 550 and a MSI AERO ITX 2GB RX 550, though I've been told all of them can hit the 400+... But figured I should mention my own personal experiences to confirm those work with the editor. 425 h/s with the Gigabyte, and 410 h/s with the MSI. I left stock clocks though, so I'm sure I could squeeze more out of them if I spend more time on it.