With the new update (2.0.7), a new config was added. So I regenerated my config and attempt to change it. No matter what I have it on, ALL pickaxes and generators will always be able to kill the angels. The only thing that could change is whether or not normal attacks will work on them. Forge Version is 36.0.43 when tested.

That's strange, could you upload your config here please?

config.zip

So is your intention to make them invincible?

I am stupid. I left my testing settings on
Download this version: https://www.curseforge.com/minecraft/mc-mods/weeping-angels-mod/files/3222604