Weaver and blue scrip.

[Sibyll]

thats still a lot of materials compared to other crafters. I got most of the scrips for my masterbooks from 2 items:
GSM lvl 56 - Dragonfang Earrings (saw the turn in option only twice though)
CUL lvl 59 - Marrons Glace

those are extremely cheap.
I didnt see other classes having such easy turn ins but if you want to lvl them anyway, then you might as well do it with scrip turn ins. Check the options daily and choose the easiest for your class. Apparently its those ramie gatherer/crafter items for WVR, for LTW it would be Dragonskin Ring.

I realize we can't expect the Devs to predict the market, but I wish more effort was put into ensuring that rewards are appropriate for the cost/time required to do these turn ins between different classes. ARM/LTW/WVR/BSM tend to have more expensive recipes than CUL/GSM just from the nature of the items those classes tend to use in their recipes (ex: items dropped from mobs).