Downgrade to APE1 from APG5

Is it possible to downgrade from APG5 to APE1? I'm currently in an FRP lockout and need the phone before the 72 hour timer runs out. But the bypass methods won't work with APG5. So I figured I could downgrade to a version where it works. But I also don't want to brick the phone. And...I'm not sure how many of the files besides the AP (BL, CP, CSC) that I need to use also.

I'm not a stranger to any of this, just want to be sure as they keep putting more and more protection around this kind of stuff.

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