In fact, the normal bias was the best for me. The other two were unusable 
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The twosided command, unusable when a geometry has “volume” and a shadowed side (so, quite common):
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The 0% error, applied on every mesh, dropped the framerate from 50 to 5fps, as it’s now loading hundred of millions of polygons like if Nanite was disabled.
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The normal bias, even loosing some shadowing details, was the best and most equilibrated option:
