Weaver material farming

[Kurogaea]

Crawler Cocoons, at least 2 hours of killing Crawlers and only accumulated up to 41 of them (nq). Chimera Manes, killed them in rotation for an hour and only obtained 4, 90k'd, came back and competed with some other guy farming manes for 30 mins and only obtained 2. I'd love to see the drop rates change for these mats as the monsters that are already strong as Odins left buttcheek and take a while to kill. Which leads me to one other concern, does it matter who attacked a monster first if your looking for mats? If yes I'd like it to be fair for both farmers and just have the loot drop for both as if they were alone.

Interested in hearing your thoughts and hopefully some feedback.