I have now complete both the Dvalin and Andrius bosses several times each, and the Childe boss once and I can say that I have only gotten a single prototype from the first time I fought Dvalin. I think this is a problem especially for the F2P and small spenders that rely on certain prototype weapons because of there refinements. Hopefully me talking about this will help to get more attention to this issue so we can fix it!
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