Now I have an actual good suggestion^^
could you seperate the mapper command "B:blacklistOresAndDusts=true" into one for Ores and one for dusts... cause usually nobody wants EMC value on Ores but Dusts are a different thing... they usually are the same as ingots... so giving them an EMC value would be good
also there are some dusts in other mods that are very useful like Pyrotheum dust in Thermal Expansion

ProjectE/mapping.cfg and projecteintegration.cfg are for ProjectE and my mod resepectivally.

oof... that means I was in the wrong mapper config all along XD sorry... still an EMC value (like Blaze Powder) for Blizz, Blitz & Basalz Powder would be nice

While I would like to add that, I don't know what values are appropriate.