I know it’s probably too late but it would be nice if we could focus it similarly to umbrals. Or can those weapons gilet an umbral option? I don’t know many drops I’ve gotten of FF total, but not once have I ever gotten the roll I want. How am I supposed to try if the game won’t even let me pick it anymore?
If you're weapon choices are limited you might have to burn a charge up on the lure to get it to reroll your options. From the bit I played around and understood choosing extra rep or mutations won't change the actual gear options. Hopefully it helps.