(2) disable the existing partitions or lower their priority to force the system to boot straight off DF2: with an ERD disk in the drive
I think I see OP's future, and it involves burning a few more ERD disks, just to make sure to get a good one.

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I made 2 ERD disks. I made sure both have the 68040.library from the original warpdrive disk. I went into HDToolbox and made workbench not bootable. Both ERD disks are still crashing on startup citing the "setpatch" error.
Not sure what to try next.