Thank you for explanation about classifier, it’s clear now.
I returned to the " -Djavacpp.platform=windows-x86_64" option and found out why it’s not worked. The issue was in Powershell that I used to to run mvn command (it looks like it swallows “-D”). I switched to cmd and it worked like a charm for all dependencies both direct and inderect. WAR size is 290 MB now.