Not sure if anyone has posted this, didn't catch mention of it in the last few pages, but I desynthed my Allagan gloves of casting and got 4x Allagan silk so LTW desynth is potentially useful even for Weavers.

Demimateria being required for so much crafter progression stuff is the absolute worst thing and probably one of the few things i despise in this game, please don't do this anymore in the expansion SE.